[jmjohn]

I had a difficulty with the micro usb port on mine but Mophie replaced it within a week and the new one is great. It provides great protection for the phone and just the right amount of extra power to get me through the day. I love it and would not trade it for anything. For what it is, the price is right.

Update: July 3, 2009.
I dropped my iPhone on the wood floor in my house and the Juice Pack Air went into 4 pieces. The top piece broke into two pieces and the front and back separated from rest of the unit, exposing the battery and the electronics inside.

I have since returned it to Mophie one more time. We will see how this goes (since I dropped it). I must admit it was far more fragile than I had originally anticipated. As a protective case, it is not very good.

Stay tuned....I will keep you posted.