I'm going to start off simply if you use allot of batteries, as I do, you need this. Not only does it charge AA but also AAA, it can charge up to four at a time or two of each. It comes with inter changeable faceplates Black, White, and Grey to allow it to blend into your wall. It plugs directly into a wall outlet, which can be a hassle if you're cramped for space, as it means you need it in an easy to access area. But besides that there are no major issues. Now for the important part the actual batteries themselves i have charged both AA's and AAA's on this, Double A's take around 5-6 hours to charge and give you a good 30 hours of battery life at least. AAA's take around 9 hours to charge and again gives you aton of battery life. I've had these for about two months and they still are working great.
Pro's: Interchangeable Faceplates, Quick recharge time, Amazing Battery life
Con's: Has to be plugged directly into a wall outlet