I have two of these cases for 3G phones, one for me and the other for my wife. They are the best case I've used thus far for the 3G. Not perfect, but they are very good.
The look is very nice with the metallic colors and the texture of the case is a silky feel but not slippery so it won't fall out of your hand. Basically a hard case with a softer feel. It fits very snugly around the phone and we've had no problems at all with slippage. It seems to keep out the dust also. No access problems as far as buttons go.
I was fortunate to find a combination of coupon codes and iFrogz sale that allowed me to get two for around $8 shipped. If you want one, look around- there are some coupons online.