In general, I agree with all of the reviews - both the good and the bad. It's an amazing film, but definitely not for everyone. In fact, who is it for? I grew up on movies like The Dark Crystal, Labyrinth, Legend and The Neverending Story, but I didn't enjoy MirrorMask, for two reasons.
It seemed that the writers decided to rewrite well-traveled children's film territory while just adding some new ideas. Since it was meant to be a children's movie, some viewers will forgive the familiar scenes, but it is a strike against it for all of us who were jarred out of our suspension of disbelief by what seemed more like borrowed ideas than an homage. I just couldn't get into it. The Neverending Story, Labyrinth and Legend in particular seemed almost to be sources for the story. I was disappointed, because I am a big Gaiman fan - except for Coraline, which also creeped me out. He is usually a very original writer.
But I would still have enjoyed the film if it weren't for the aesthetics. Artistically and creatively, it's impressive, and I can understand why it has the beginnings of a cult following: Mirror Mask is better than Labyrinth (a similar Jim Henson Company movie) in a lot of ways. It's more mature, with a better heroine, a decent plot and thoughtful underlying themes. But to me, DM's art seemed bizarre and disturbing - not for children. This is not a light-hearted, pretty movie. I doubt it would appeal to most fans of the familiar fantasy genre. The script was thoughtful and sometimes fun, but the visuals were insane and scary. I'm surprised I didn't have nightmares after watching it.
So it's not mature enough for most adults, but too old for most kids. Who is going to love this movie? Probably mostly artists and film students. Just my opinion.
