Being the case hore I am, decided to get one of these. Really like the slim profile. This has to be the slimmest case available. Feels like no case at all and provides good grip, but also offers very little protection. I wouldn't expect this case to provide much protection against the dreaded getting-out-of-the-car-with-phone-in-lap-drop-to-the-pavement scenario. My seidio case would, however. Even so, I really like the almost no case feel of the casemate and it makes the phone feel much smaller than the seidio case.
I could use this as an every day case and for more treacherous activities I'll break out the seidio case.