Just an FYI - I tried this case at the ATT store. Once it's on the phone, it feels nice and solid and it will definitely stay on the phone if it's dropped. HOWEVER, getting the case back off the phone is next to impossible. It took me about twenty minutes messing around with it before I finally got it removed. Even the ATT tech guy couldn't get it off (and didn't want to try any further for fear of damaging the phone). I really thought I was going to damage the phone trying to get it off. When it finally did come off, the front half of the case was a little distorted from having to pull so hard on it to separate it from the back half.
Speck makes some nice products, but I would not recommend this particular case. Right now I'm trying the CandyShell, which seems nice and solid as well and not anywhere as difficult to remove.