It charges my iPhone 4s and even my iPad 3 (which was not promised at all: many chargers do not have enough amperage to charge an iPad) faster than the original Apple charger!
It comes with a second cable mini USB connector for iPod first generation, which does not serve me personally; but as I had also a USB cable with connector BlackBerry, it means that I can take a trip one charger for my iPhone, my iPad and my professional BlackBerry. Saves space and even, ultimately, weight!
Only small downside, the supplied cables are not very long. I USB extenders but I wonder if it does not slow performance. (If a player can answer this question in the comments below, it will be welcome!)
In short it is really a very convenient product and if it does not crash too fast (you never know, but it is the case with all accessories ...) I would say it is almost perfect.