This charger is recommended by many professsional photographers. Each of the 8 slots can take either an AA or AAA battery.
With two charge speeds, either the standard rapid 1 hour mode, or a slower but kinder to the battery 2 hour mode. A conditioning mode also will intelligently put your batteries into a charge-discharge-charge cycle to try to refresh it.
The charger works great most of the time, batteries are charged quickly and don't get too hot, suggesting the charge is doing its job of looking after them.
There were a few times when I inserted a battery and it isn't recognised at all, no indication at all, not any alert or warning. I can only assume the battery was faulty, but assume is all I can do - that's why I've taken the star off. The led on the power adaptor is also very bright, if leaving to charge over night in your bedroom then it will light up the room, I found myself turning the led to face down just so the room isn't so bright, but that's just nit picking.
All in all, I would buy this again if I have to. It's great to be able to charge 8 batteries quickly and safely.