I think it's a great game, but many people are comparing it to N64 Mario, which I never played; this is the first Nintendo console I've owned since SNES.
The controls can get confusing when Mario is on the bottom side of something that you can walk completely around, but I'm getting better at it.
Yeah, the game is brilliant. Closer to M64 than Sunshine was. For the first couple of hours it feels slightly strange (upside down and whatnow), but becomes intuitive before too long. The controls are smooth and remeniscent of M64. The cameras are much better than Sunshine. The game progressing is essentially the same as the previous games. There's a lot of eye candy on top, which can give the impression that the game is a bit complicated. But once you see through that the game is very familiar to fans of the series. Personally I'm loving it.
People always give me grief for getting a cyclowiz (especially a v1), but I've always found it to be great. The switch is a pain when you see how easy wiikey owners have it, but I can so live with that.