Let me tell you that I won't spoil the movie by telling you everything that happens, I hate that!
First the good: In the first hour or so, I was in heaven. It is so yummy you could eat it. I love the sets, the clothes, the castles. I loved the Caterpillar (Alan Rickman, who I LOVE) and the Cheshire-cat (Stephan Fry) the very best, the March hare and dormouse are pretty cute too. The acting is great by all except a few. I thought Anne Hathaway and Crispin Glover were weak in their parts. Johnny was wonderful as always and Mia Wasikowska was a fine Alice. Helen Bonham Carter is terrific.
Now the bad: I have no real complaints except for one big one, they changed the story. I love the original story, so that was a big disappointment, but it may not be for you. I figure they did that to please the masses, whatever the reason I feel it was a huge mistake.
Being the sport I am I decided to love the movie anyway. I loved that it was in 3D and it was a very fun ride with lots of eye candy.
I give it a B-.