I never have any trouble with it, but it is a little more of a pain than the empeg as you have to pick it up and mess with it if you want to change the current playlist. Usually I just pick a playlist and go with it; it's easy enough to reach down and skip songs while I'm driving. The other pain with the Karma is that it doesn't stop playing when you turn off the car, so you have to be careful about that if you want to keep your place (especially if you're listening to an audio book).

There are benefits, though. The Karma is much better suited for carrying with you and plugging into your stereo than the empeg. Plus it's just a great product all around that is really worth having. If I were in your situation I'd definitely buy a Karma and do some kind of aux in.