I bought one at best buy. I returned it slimmer immediately. indeed it is a very nice case with s great feel to it. BUT, it is extremely difficult to access the volume buttons. And to a lesser extent the vibrate toggle. I just wanted a car fog the weekend when I routinely take my 4S out of its otterbox ford cleaning and general sleeker feel. I imagine all (incase brand) sndl cases fit the same way with limited access to he buttons.
If you're used to this type of case then it's a great case. The leather feel is exquisite. The fit is really snug (indeed it was a little too hard to remove it).