Just got Atom from Sideshow. Very cool figure, but that fan sounds like my old computer going bad. Love the lights though and it didn't take me 3 hours to put the batteries in. 2 batteries in the head works just fine - luckily I had experience with that before.
Picked up one of these through an Amazon reseller for a *ahem* Real Steal, and I love it. Quite a bit top-heavy, I didn't trust trying to balance it without use of a stand. I like the electronic features, I just wish there was a way to turn on the torso lights separate from activating the fan. FYI, a pair of AG4 batteries will work just as well as AG1 batteries in a pinch; I had a couple extra ones lying around from my 3A Halo Carter and was pleased to find that the AG4s fit and worked fine.