I did not want the unit, but it came with the X5 I found in stock.

Here are my observations;
1. The kids LOVE IT! My X5 is now their favorite ride. (they are 7 and 9)
2. I do not like the way it folds onto the front arm rest, its not in the way, but its in the way.
3. The screen is in the center and pivots either direction which is nice.
4. It is a bit low, but the kids dont complain.
5. I would not prefer the headrest mounted units, I think they look bad IMO + I dont want to replace my comfort seats, you would have to shoot me first.
6. It integrates with the Idrive in that you can turn off the controls and prevent the back seat from using it. + it integrates with the sound system.
7. You have the option to play thru the stereo sound, or thru head sets. The wireless headsets work great. You can also use wired headsets.
8. There is also an aux input to hook up an Xbox or Nintendo...nice for vacation

Overall, I still would not add it if I was custom ordering, but only because the kids primarily ride with my wife and rarely ride in my X5.

If on the other hand, this was the primary vehicle for the kids, I would order the factory option over non-factory retrofit.

__________________
2013 X5 35i M Sport