The Noreve case is very well thought out, attractive and appears to be robust. It does not totally enclose the phone, but it does protect the screen, keyboard and back. the detachable belt clip is a nice idea. (I have used the anchor point to fix the case to a neck cord.)
The phone is held firmly in the case, but it can be easily removed, for example, if you need to pull the battery. Most important to me, it locks the phone when you close the flap. Definitely worth spending the extra for!