Wow, just returned from this movie. Absolutely amazing. People, take Let-sensei's word for it, this is worth seeing. By turning a ninety minute animated adaptation into a live action remake that clocks in at just a little over two hours, it definitely opens up a lot of ballroom-sized space for extra exposition and additional characterization (especially on Belle and Beast's part) that weren't in the original production at all. However, there are some very slight liberties taken with the story as a result, just to let you know. Also, there are some new songs for this remake, hence the need for a longer running time. As for the Beast's design, perhaps the most important detail to everyone here, it turned out better than you might think. I've heard the complaints about how he doesn't look beastly enough, but trust me: it works in action.
I will tell you one non-spoilery detail: You will never look at one character quite the same again. That is all. I've said enough, see the movie!