I just got back from the midnight showing (paired in a double feature with The Nightmare Before Christmas, which is AMAZING in 3D), and I have to say, I really loved it. I think it's definitely a return to form for Burton. It's not his masterpiece by any means (I believe Edward Scissorhands deserves that title), but it is a really fun, really heartfelt, and obviously very personal film for Burton, and I think it works. The animation was stunning and all the characters were great. I had a few very minor gripes here and there, but I really believe the film is strong enough for me to overlook them.
The best part, I think, was that this was definitely not an inflated version of the original short. This feels like something new entirely, while still retaining the spirit and even some lines and imagery from the original. It was really great.