fantastic!
I'm impressed with the art style and the audio production, it has some amazing sound design and the music is absolutelly fantastic. The story is quite the short end of Rayman, but it really doesnt matter. Be prepared to endure some well crafted, but sometimes pretty challenging levels where precision is absoluely required and a great amount of memorization and precise timing to somehow get a spiritual experience.
There's not a good reason not to try Rayman Origins and get the developers excited on making more titles like this. 2D is the perfect environment for a great platformer. Go get it.