I hear its pretty good on the Wii. But I dont know really know how it is since i dont have it. I have it on my 360 and the biggest and probably only downfall is online. EA servers suck so there's a delay. That could be annoying using motion controls. Its annoying on the 360 and it doesnt use motion controls.
But if you dont care about online I think its good.
I have madden 08 for the wii, its pretty damn awesome in my opinion. You only use motion controls for throwing and tackling, nothing hard. You also use motion controls for stiff arms and juking. The rest is controls. Overall = Great