Got back from taking the little sister to this. I'd say it was alright, the main problem, and this will probably kill it for a lot of people, is that the music was pretty bad for the most part. There's 3-4 good songs and then the rest are terrible. That's not so much the fault of the performers though, annoying lyrics were the main issue, particularly for main character Anna (Kristen Bell).
Fantastic animation though, particularly for all the ice magic stuff. Also Ilsa, the MC's older sister/ice sorceress was really pretty. The main male character and his reindeer are every person you've ever known with a large dog and a guitar.