^ I second this. I had a Sticker boy skin on the back of my phone and the Caze lifted the corners. I also have a Bodyguardz Pure on the front and there is absolutely no lip around the screen with the glass SP installed.
The case looks very nice on the phone and is definitely the slimmest iPhone 5 bumper I've seen, but what's the point of a bumper when it offers no drop protection (at least if it lands on the screen) and does not allow you to keep a skin/screen protecter on the back of your phone? If you add the potential it has to scratch the aluminum sides due to its tight fit, the bottom line is that I can see this case causing more damage than it prevents. Might as well go naked...
My vote for best bumper case (that I've tried) goes to the Photive Hybrid; it's still thin (more so than the original Spigen Neo Hybrid EX), fits with a glass SP and back and side skins, and offers some drop protection/shock absorption. Plus, unlike the Monoprice and Elago Slimfit bumpers, which have the exact same design and dimensions as the Photive, the latter does not mess up the aesthetic with obnoxious logos plastered all over the place.