I'll have to do a more detailed review later, but I opened up Ryuki and he's alright. I would say that these figures (or at least this figure) aren't actually as bad as what I had feared, but I don't think this is quite going to be the next big thing like Bandai's trying to push it to be (but they've already got Knight & Momotaros lined up to come out,, so hey.)
As it is, it's basically poseable enough to not feel like they failed, but not nearly as poseable as they probably intended it to be. I like it enough that if I saw the others for as cheap as I got this one (about $10 at a con) I'd pick them up, but I think I'll pass on the others until then.