In my experience an mp3 disc is much easier to navigate when the deck has a remote. Also, that unit has an aux input on the back - before you install it, plug something into that and run it to your glove box - voila - your own BMW/iPod rig.

edit: ok, so you wont be able to control the iPod from the glove box. But having the aux on the back makes hiding the cable a lot easier. If you find a place to wire in teh dock, that would make using the iPod much easier.