I haven't bought a Wii or DS game since 2007/2008, besides this (Ordered it a week or two ago on Amazon).
It looked so amazing, and worth the money. When I saw that it got leaked on my homepage, I couldn't believe it. I normally never download a game from a different region, but I did.
The game is all I expected it to be. The aiming is amazing. The Wii Motion Plus helps the IR pointing a little, and makes it so smooth.
The game so far is great, and it's definitely worth paying for.
Edit:
Yeah, it works with the .DOL fix thing from Wii Sports Resort. If you're having trouble, look up that thread.