The costumes and the settings are good in this. I especially liked the sight of Julia Roberts in her yellow robes stepping across those moonlit duckboards towards her mirror cavern.

I actually didn't like a lot of them. The only ones that looked OK was Snow Whites bandit outfit, her white outfit, and The Queens red Gown. That end blue dress with orange sash was an eye sore.
Superman & Wonder Woman

The costumes were a highlight of the film.
Its that man again!!

The costumes were created by Eiko Ishioka, who designed the costumes for the Beijing Olympics and has won numerous awards for her production design, costume design and art direction (including an Oscar). Unfortunately, this was the last movie she ever was involved in, as she died in January. Mirror, Mirror was dedicated to her.

The blue top with the black bodice Snow White was wearing was pretty cool. I can see women wearing that at the ren faires.