Not a great design
Crutchfield Customer Review (What's this?)
Pro-Fit had good intentions when they designed this, but unfortunately it didn't turn out well. First of all, the plastic part was made to be wider than the actual iphone because of the foam they use to cushion it (the cushioning is the good intention). The bad part is that, once the phone is in (and it does fit fairly snugly) there is an inherent alignment problem and the phone can be moved from side to side. The foam itself is supposed to be glued on using some type of 3M adhesive, but in 90 degree weather, some of the foam started peeling off. Also, the bottom of the holder covers the speaker and there is no access to the side switches if you should need to access for whatever reason. The phone does slide in and out easily, but overall I'm not pleased (durability concerns) so I returned it.
Pros: Snug fit.
Cons: Foam peels off in hot weather. Not really a custom iphone fit.