The Phantom 3 Professional has been discontinued. Check out our drone review to see current models.
The DJI Phantom 3 Professional offers an upgraded 4K camera in comparison to the 2.7K rigs on the other Phantom 3 models. Otherwise it performs very similarly to its Phantom 3 brethren. This bump up in resolution probably won't be worth the corresponding bump up in price for most users, and if you're looking for better video quality you can get the high end performance of the Phantom 4 by spending just a little bit more. Though it is a good copter, this places the Phantom 3 Professional in an odd spot where most users would be better off saving some money or spending a bit more.