Nightmare Before Christmas was very good. But I was only interested in seeing it once. It's not "authentic," but it was done very well, imo.

When I saw 3D NBC a few years back, I could occasionally spot clues and imperfections to its non-stereoscopic origins. I distracted myself throughout analyzing the image for further evidence of the conversion - which was a dumb way to watch. Since B&B is cel animation, I suspect I would spend the movie similarly analyzing how flat drawings have been rounded out and so on. If it opens here, I'd probably go, though. Heck, I went to Piranha 3D last week - it was also a conversion, but a pretty good one - in any case, they made sure that the boobs and gore looked as dimensional as possible. (And wow, what a brazen exploitation-er that was - basically may as well have been titled We Know Why You're Here, Guys. I left with half of my brain telling the other half it ought to be ashamed of itself.)