I got my Banzaitron last night from BBTS, and he's interesting. I actually like him more than I thought I would given other reactions to the figures. He did have a smell to him when I opened him, but that dissipated pretty quickly.
He's pretty neat. I like how he feels in hand, he has some weight to him and feels like he was well put together. Posing is decent but limited in range, but that is probably my main complaint and it isn't even that terrible, though notable in the improvement it could use.
The alternate hands are fun, and can help him be more expressive and make up some for the limited articulation range. I also like his sword and Razorsharp is pretty neat too, though I really wish he had at least had a joint to flip the gun out. Razorsharp probably only needed 3 or 5 moving parts total to be an excellent little update, but as is he is a simple accessory that is a solid piece, but is painted nice and can still combine with the gun.
So yeah, overall, Banzaitron is neat. He was one of maybe 3 revealed so far that I was interested in, and it is enough to convince me that Tarn will be worth getting, and it will make me consider Bludgeon some more too.