I think the biggest debate was whether the graphics are good.
First of all while the sound is usually very good (Rabbids are awesome sounding), I noticed one HUGE flaw. Rayman has the exact same voices as the rabbids....... This gives the game a very, very not yet done feel and ruins the presentation.
Then there's the graphics. I was really torn between this. I love how the shooting levels are done. The camera taken from actual locations looks pretty good when mixed with the in game characters. Occasionally the frame rate slows down and the eneimies look crude, but for the most part they have an interesting flare.
Then there's the graphics for the other parts. They have a good style, and you can see there was an amount of character design (the characters look great and are the highpoint along with the shooting levels) But seeing chepaly animated backrounds is a bit annoying, and makes the game look like an unprofessional game. The textures can look a bit muddy as well.
One thing that shines though is the minigames. They are very fun to play, and the different locations part makes them even more enjoyable.
If you just want a fun game, I highly recomend this game. If you want great graphics as well, i'm sorry to say there aren't many good looking mini game collections.