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Eufy RoboVac 11S Slim Review

While this robot vacuum is one of the cheaper options out there, we weren't too impressed with its overall performance
Eufy RoboVac 11S Slim
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Price:   $220 List | $149.99 at Amazon
Pros:  Inexpensive, good navigation
Cons:  Mediocre cleaning abilities, limited smart features
Manufacturer:   Eufy
By David Wise and Austin Palmer  ⋅  Jan 19, 2021
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43
OVERALL
SCORE


RANKED
#10 of 10
  • Navigation - 30% 6
  • Home Coverage - 20% 4
  • Carpet Cleaning - 15% 4
  • Hard Surface Cleaning - 15% 4
  • Pet Hair - 10% 3
  • Smart Connect - 10% 2

Our Verdict

All in all, we aren't particularly thrilled with the performance of the Eufy RoboVac 11S in our tests. This robot does do a decent job of navigating itself around but we found it missed significant parts of the floor in a typical cleaning cycle. Additionally, we also found that it delivered decently disappointing results in our cleaning tests and has considerably fewer smart features than many of the other robots.

Compare to Similar Products

 
Eufy RoboVac 11S Slim
Awards  Best Buy Award  Best Buy Award Best Buy Award 
Price $220 List
$149.99 at Amazon
$270 List
$209.99 at Amazon
$500 List$300 List$250 List
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Pros Inexpensive, good navigationGreat navigation, low priceAutomatically empties its collections bin, good navigation, plenty of smart featuresGreat value, excellent cleaning abilitiesInexpensive, decent set of smart features
Cons Mediocre cleaning abilities, limited smart featuresCould be better with pet hair, so-so cleaning performancePricey, poor performance with pet hairGood, not great at navigatingMediocre cleaning abilities, poor at picking up pet hair
Bottom Line While this robot vacuum is one of the cheaper options out there, we weren't too impressed with its overall performanceIf you are shopping for a low-cost robotic vacuum, then we think this product is one of the best bargain options out thereThe automated dirt disposal is a neat feature but this pricey product didn't score too well in our tests overallThis is the best choice by far if you are shopping on a budget but don't want to sacrifice performanceIf you absolutely have to have a robot vacuum and are shopping on a tight budget, the Ecovacs is a decent option
Rating Categories Eufy RoboVac 11S Slim Roborock E4 Roomba i3+ with Cle... Neato Botvac D4 Con... Ecovacs Deebot N79S
Navigation (30%)
6.0
10.0
8.0
6.0
6.0
Home Coverage (20%)
4.0
7.0
7.0
7.0
4.0
Carpet Cleaning (15%)
4.0
5.0
6.0
7.0
4.0
Hard Surface Cleaning (15%)
4.0
5.0
7.0
6.0
4.0
Pet Hair (10%)
3.0
4.0
3.0
6.0
2.0
Smart Connect (10%)
2.0
7.0
7.0
7.0
6.0
Specs Eufy RoboVac 11S Slim Roborock E4 Roomba i3+ with Cle... Neato Botvac D4 Con... Ecovacs Deebot N79S
Bin Capacity .6L .64L .53L .7L .55L
Dimensions 12.5" diameter
2.8" high
13.5" diameter
3.5" high
13.25" diameter
3.75" high
12.5" x 13.2" x 3.9" 13" diameter
3" high
Measured Weight 5.9 lbs 6.6 lbs 7.1 lbs 7.4 lbs 5.2 lbs
Battery Li-ion Li-ion Li-ion Li-ion Li-ion
Warranty 1 year limited 1 year limited 1 year limited Robot - 1 year limited
Battery - 6 month limited
1 year limited
Recharge & Resume Yes Yes Yes Yes No
Charge time 5-6 hours Up to 4 hours 2-3 hours 2-3 hours 4-5 hours
Multi-Room Navigation (Cleaning) No Yes Yes Yes No
Spot Clean Spiral Spiral Spiral Square Spiral
App No Yes Yes Yes Yes
Barrier Type None Physical (magnetic strip, not included) Virtual (not included) No Go Lines (in App) and Physical (magnetic strip not included) None
Filter Replacement Cost 6 for $15 Washable
2 for $33
3 fr $35 Standard 4 for $20
High Pre 2 for $20
Ultra 2 for $30
3 for $25 (accessory kit)
Brush Width 5 1/2" 6 1/2" 6 3/4" 10 3/4" 5 1/2"

Our Analysis and Test Results

The Eufy RoboVac 11S Slim doesn't systematically clean, making it a poor choice if you are looking for a robot that can clean your whole house reliably. We would caution against this model unless you only want it to clean a single room.

Performance Comparison


The Eufy is an inexpensive option but not one of our favorites.
The Eufy is an inexpensive option but not one of our favorites.
Credit: Laura Casner

Navigation


We started off our robot vacuum testing by rating and ranking each robot on how proficient they are at navigation. We looked at how easily each vacuum maneuvered around furniture, how they handled high-contrast flooring, and how quickly they could locate their docking base to recharge. The Eufy RoboVac 11S Slim did decently well, earning a score just above average.

We did find that this vacuum actually does a decent job of navigating its way around furniture. It does bounce around randomly but manages to avoid getting stuck. It also does a good job of finding its charging dock, provided that it has an unobstructed view of it. If it doesn't, then this robot takes absolutely forever to find its charging dock, forced to essentially bounce around randomly until it stumbles back into direct line-of-sight with it.

We found this robot can struggle to find its charging base if its...
We found this robot can struggle to find its charging base if its view is obstructed.
Credit: Laura Casner

Fortunately, this robot did well with high-contrast flooring. Its edge detection sensors never triggered when going from light to dark flooring or vice-versa.

This semi-random cleaning robot isn't the best for multiple rooms.
This semi-random cleaning robot isn't the best for multiple rooms.
Credit: Laura Casner

Home Coverage


Our next set of tests focused on how effective at cleaning your entire floor each robot is. We based scores on how much floor area each robot cleaned in our test room, how well each one did with spot cleans and multi-room cleaning, if you can create barriers to cordon off areas you don't want cleaned, and if they can automatically dock, recharge, and resume cleaning if their battery gets too low mid-cycle. The Eufy RoboVac 11S Slim delivered some unimpressive results in our minds, earning it a below-average score.

As we mentioned before, this robot isn't a great option for multi-room cleaning. Its lack of systematic mapping means that it will eventually clean multiple rooms but it's only by random chance. The spot clean feature on this robot is about average, covering about 30 square feet.

This product doesn't keep track of its cleaning progress so it also can't really pause cleaning, recharge, and pick up where it left off. This model also lacks any barrier system.

This robot does about average when it comes to cleaning a single room, getting most of the floor area but the performance is quite variable due to its semi-random navigation. Sometimes it gets most of the room, while other times it misses huge swaths.

We found this robot delivered subpar results when it came to...
We found this robot delivered subpar results when it came to cleaning carpets.
Credit: Laura Casner

Carpet Cleaning


The Eufy RoboVac 11S Slim continued its so-so performance into our carpet cleaning metric. We tested each robot with flour, rice, oats, and mini-wheats to see how effectively they clean. We also checked to see how closely each robot can clean along the edges of a wall. The RoboVac 11S again fell a little short, earning another lackluster score.

We found this robot leaves a perimeter of carpet uncleaned that measures about 3.5" across along a wall and up to 5" in the corner of a room.

There was a decent amount of flour left behind after this robot did...
There was a decent amount of flour left behind after this robot did its cleaning pass.
Credit: Austin Palmer

Unfortunately, this robot barely picked up any of the flour from the short carpet. It did a little better with the rice on the flat carpet but left plenty nestled in the deeper piles of the shaggier carpet. It performed very similarly with the oats as well.

We spread a measured amount of rice or oats out for this cleaning...
The aftermath of one of our cleaning tests.

However, it did improve a bit with the mini-wheats, collecting all of the cereal on the flat carpet and only leaving 2 behind on the fluffier carpet.

The Eufy's hard floor cleaning performance also didn't impress us...
The Eufy's hard floor cleaning performance also didn't impress us too much.
Credit: Laura Casner

Hard Surface Cleaning


Our testing procedure for hard floor cleaning performance is identical to carpet, with the tests run on a section of hardwood floor instead of carpet. The RoboVac 11S did about the same, earning another below-average score.

This vacuum left a slightly larger border of uncleaned area along walls and in corners, measuring about 4" across along the wall and up to 6.5" in the corner.

Our robot pen prior to being cleaned by the Eufy.
Our robot pen after being cleaned by the Eufy.

The RoboVac 11S Slim left tons of flour behind on the surface and in the cracks of the hardwood, only cleaning in the very center of its path.

The 11S missed plenty of flour.
The 11S missed plenty of flour.
Credit: Austin Palmer

It did a little better with rice and oats, cleaning the majority of the mess and only flinging a small amount off to the side.

We used the same amount of oats and rice as our previous metric.
Some of the rice grains flung to the side after the Eufy did its...

The RoboVac 11S Slim also struggled to collect the mini-wheats, lacking the clearance to reliably clean up these larger items.

We weren't overly impressed with the 11S when it came to pet hair.
We weren't overly impressed with the 11S when it came to pet hair.
Credit: Austin Palmer

Pet Hair


Our final cleaning test for these robot vacuums rated and scored their performance at cleaning up pet hair from flat and fluffy carpets. Again, the RoboVac 11S Slim proved to be a bit of a disappointment, earning one of the lower scores of the group.

It barely collected any hair, leaving more than 80% behind in both tests.

This robot has a remote control rather than an app.
This robot has a remote control rather than an app.
Credit: Laura Casner

Smart Connect


Our last metric looked at any smart features and functions these robots might have. The RoboVac 11S Slim again is fairly limited in this regard, earning it a low score.

This robot doesn't have any wifi or app connectivity but does allow you to set a schedule with its onboard controls.

Value


While the RoboVac 11S Slim is one of the more inexpensive options out there, we found comparably priced models that performed much better in our tests and we would recommend those over this one.

Conclusion


Overall, we weren't too impressed with this robot and would generally suggest checking out other options.

David Wise and Austin Palmer