I have owned Incipio dual layer cases for for the 3G and the iphone 4. The last case I owned was the incipio destroyer which was a great case. I just put this case one and I like it even better than the destroyer. I like how it wraps around the edges to the front of the phone. Best case out there!
This was one of the best cases I tried (and I have tried at least 10) It was a sturdy rubber with a hard plastic overlay which made it even sturdier. It does not add too much bulk to the phone which is good. I just wish I covered at least the head phone jack and the charging port. Otherwise it was a very good case.