My "Day 1" review
I got my case in the mail today and I am very happy with it. I had a Incipio Silicrylic case since I got my phone and I definitely like the tough case better.
The case fits pretty snuggly around the phone with a nice grip texture on the outside. The back of the case is about 3-3.5mm thick and I think I should provide enough protection from casual drops. The front lip around the screen is also raised more then the other cases I have seen.
The only "problems" I see with the case are the volume buttons are recessed into the plastic slightly requiring a little more force to press them. The bottom silicone lip that goes across at the dock connector is also a little loose but that is a problem with all cases that use silicone it seems. Neither of these are problems for me but some people may not like it.
I have not noticed any problems with the flash although I have not tested it very much. I'll test it more tomorrow. It it better than the Incipio case I had on before however.
Overall I would recommend the case.
Update: I have taken some test shots with and without the case on and I do notice a difference but the pictures with the case look better to me. However, this is not the ideal setup to test this because I have too many reflective surfaces around.
With case:
http://img340.imageshack.us/img340/687/with.jpg
Without case:
http://img340.imageshack.us/img340/5739/without.jpg
I try to test more tomorrow.