I dunno what all the hubbub about use with the iPhone is about.  The only problem I have with my iPhone 3Gs is that it does not do forward and back track. That, however is a function of a particular bluetooth profile that the iphone does not support, not Kensington's fault.  I find this to be the a pretty optimal solution regardless of the track buttons. I jump in my car, glance down to make sure it's already repaired, hit the play button on the remote, and the iphone starts playing through my stereo right where I left off.  When I get out of the car, it pauses for me.  If I need to change tracks I reach in my pocket and hold down the home button and use the voice controls via the kensington unit to move to the another track/playlist/artist/album. Switching to incoming calls is seamless as well.