Finally got to ride this today.
It's a very solid ride... for Fantasyland. Has no business being in Epcot. At all.
That said, just judging the ride itself, there is some impressive stuff in there, particularly the animatronics (each Olaf appearance is pretty terrific). I was surprised to see a few "dead areas" within the ride, but that's a pretty minor thing. It's a very respectable effort considering the space they were forced to work with.
Also, has anybody commented in this being a wetter experience than Maelstrom? I never got significantly wet after the drop on that ride, but my whole left side was nearly drenched on this one.