Despite Lasseter taking over at Disney, Frozen is much more of what I consider a Disney movie than a Pixar movie. It's a fairy tale with princesses and castles and magic and songs. It follows the line of films like Cinderella, Beauty and the Beast and Enchanted.
So, this review probably isn't so much for you as for your daughters or nieces, who will absolutely love this movie. It's beautifully made, has a good story, good characters, and has an infectious set of songs that you can't get our of your head.
It's currently out on DVD and Blu-Ray and I suggest that if you're buying it for your kids because they won't watch it once.