Here be some spoilers
Well. I saw it, and I really liked it. It does suffer from the good old 'Side characters are so much more interesting then the main characters' thing I have with most movies (Go Hare! Go Dormouse! Go Cheshire Cat!). And they really should've went with the 'Less is more' thing regarding the Hatter's backstory..... (I mean, it worked for the Cheshire cat, only a few hints about the fact he Ditched (?) the others at an inopportune moment. So much more interesting.)
That being said, it had stunning visuals, my favorite portrayal of the Cheshire cat as of now. (Who is probably my favorite fictional character ever) and a simple, but compelling story. Thumbs up.