There's no denying that Frozen is a brilliant movie, never mind that it's from Disney, the production side of the film is brilliant and it's voice cast works exceptionally well to their characters appearance.
Most of the storyline flows well with the main part being saving Anna from a frozen heart and stopping Elsa or helping her control her powers. The characters of Sven, Olaf and Kristov give brilliant comic relief to an otherwise quite dark Disney storyline, the main point of this is maybe they should of kept with a dark storyline like The Lion King did in the 90s.
The problem with this film is several parts feel very rushed, it's been admitted by Disney that the last product was far from the original with Elsa originally the villain and Hans a hero and some feeling of this is clearly early in the film which makes Hans sudden character change shocking only due to their being no evidence of this possibility and it being thrown it because Let It Go was written.
Overall the film is good but with many wild-cards thrown in part way through the story it can sometimes be quite a confusing watch for some viewers.