I have the Mophie too and I love it. It's one of the best cases made Mophie. If your going to get a battery case I would def. Take a look at the Mophie case at the store.
I also have to agree, it's my 1st battery case ever & I am very happy w/its performance, function, feel & looks. Read the reviews you just can't go wrong w/the Mophie for the iP4😀
its not that bad. guess im used to my old windowsmobile phone. battery life means everything to me since its my business phone. thanks for the insight guys