I have the Boxwave White TPU with Frosted back case mentioned earlier. It's a nice case but a little thick. The back is pretty touch and is thick enough so that the camera glass is protected.
My biggest complaint is that it picked up blue stains from a pair of new jeans. Took a couple of weeks for the blue to disappear from the case. After about 3 months, the tpu sides are starting to have a very slight yellowish color to them. Tried scrubbing it with Comet Cleaner but did not help.
I also agree that the volume and power buttons can be a little difficult to push and the volume buttons kind of creak, its the TPU rubbing against the the button.
It's not my favorite case I've owned but I'm also not in a hurry to replace it.