"Does not keep the charge"1.5 starson by Richard1225
Pros: Nice style and light weight. Ease of use.
Cons: First unit would not keep a charge after a few months of infrequent use. Mophie replaced it with a "new" unit which does not hold a charge even when not attached to the iPhone 3GS.
Summary: Lack of quality control of this product that would allow it to work for at least a year is a serious limitation. I recommend against buying it.