Hello,
I saw Alice in IMAX 3D earlier today, and here are a couple of thoughts on it:
1. From the get-go, I, like many others was expecting an entire opening sequence with the camera flying down the rabbit hole and going through different environments, ala CATCF & ST. The main reason that I expected it was because of the length of Alice's theme and I envisioned how it would have happened, but I do like the title going into the London sky, it kind of reminded me of the beginning of Sweeney Todd.
2. I really did enjoy the acting, it was very smooth and everyone portrayed their characters very good. I did like Absolem, since we never got a smidgen of footage of him before the release, so I was pleased to hear Alan Rickman lending his voice to the "Caterpillar". I also am pleased that they didn't tamper too much with the lines that I love from the teaser, trailers, and featurettes (especially the Mad Hatter).
3. The Mad Hatter! Ever since the first image of JD as the Hatter popped up on the internet, I couldn't wait to see him in the film, which is why I grabbed on and loved all of his lines (especially "Only if you believe it is" and "I should very much like to hat it..." lines). I was however disappointed, although it fit with the film, that the 'Flashback Tea Party' was cut down, since I loved the Hatter's lines from the B-Roll Footage "The Poisonous Monkey was your friend, eh? Thackery do not be rude", etc. Allover, as y'all have mentioned, he did remind me of Jack when he said some of his Scottish lines, but it didn't bother me in the end.
4. Danny Elfman's Score. Now, this was another one of the most anticipated things of the film for me. I fell in love with Alice's theme when I heard it for the first time, but I do have to say that, as I mentioned before, that I was disappointed with its absence at the start of the film, although there were tiny hints, I just wish we could've heard the entire track. I love the Alice Reprises throughout the score, and I also love the Elfman used an organ yet again, which he seems to be fond of in other Tim Burton films. I especially like "Proposal (Down The Hole)".
5. Although I loved the IMAX experience, I wish I would've seen it in 2D first off, because I found it distracting to the film itself, especially when Alice fell down the rabbit hole. I did like how some of the objects/characters flew towards you, especially the butterfly and the 'croquet ball', but I want to see it in 2D now so I can just focus on the movie itself.
Overall, I loved the film, being a big Tim Burton fan, and I was only really disappointed with the opening credits and the Futterwhacken, but that is a different story altogether

. Oh, and don't even get me started on CATCF, since I love Depp's Wonka greatly, and the Hatter and Wonka are like night and day, which makes Depp that much more of a dimensional actor.
Thanks!