What's good: Truest rendition of Looking Glass I can recall, and that puts it way ahead of most. Great Humpty Dumpty - and I've heard literary analysis from the recent generation of intellectoids that made a lot less sense. Then, my favorite: the White Knight, possibly Carroll's way of injecting his real-world self into this lovely bit of nonsense.
What's not: the effects. There's an awful lot of primitive green-screen work, with mismatched foreground and background, feet sliding in thin air (not when they're supposed to), and more. Visually, this flick sits way down my my preference list, but the story-telling very nearly makes up for it.