When I watched the film I quite like the music, however, I found that on the soundtrack the main theme in the film is hard to find as in the film I don't remember it having lyrics, which it does on the soundtrack.
As it happens I actually prefer the soundtrack version as in the film I feel the main theme sounded too close to one of the themes in Avatar. Unfortunately though "Alice's Theme" is really the only track on the soundtrack that I do like. The rest is quite average I found.
Not one of Elfman's best scores, but if you feel the need to buy it then do. But otherwise I'd just buy the first track off iTunes or something.