Pros: It is very light, compact, easy to carry and it comes with an extra charging cable. Ideal for a long day at school or anywhere else where you need heavy iPhone usage. It's got a pretty high capacity, too and charges your iPhone quickly.
Cons: The build quality (especially the charging cable) is not excellent, but more than tolerable at this price point.
Bottomline: A very good buy if you happen to need to be using your iPhone all day. Cheap, light, high-capacity, extra sync cable. I'm very happy with this product.
