We just got our second shipment, and I got mine-- I have to say the AT-RT is a nice little vehicle. The best thing, which I assume is an undocumented feature, is that there's a couple of tiny slots on the back of it. They're perfectly sized to put the clip from a Clone blaster, so the ship actually has storage for weapons, which is something I've been complaining about to myself for a while. Kudos to Hasbro for reading my thoughts, but I'm going to have to start wearing the foil hat again.
It's pretty stable too-- jointed at the "hips" and "ankles". It is "fun." The little cannon in the front moves around too, so I'd say this one is slightly better than the Freeco Bike in terms of user-friendliness/fun but still doesn't feel as solid as, say, pretty much most of the original Mini-Rigs.