A lot of fun, it's like a nintendo version of an arcade shooter in your house.
Visually the game is pretty good. It's using the same graphics engine that The Legend of Zelda: Twilight Princess used. So, it looks exactly like Twilight Princess, but without the expansive free-roaming kingdom. If you're a fan of Zelda games you'll enjoy the style in the game, I know I did.
The soundwork is solid enough. As always Link doesn't talk, but I like it that way. The music is pretty good, nothing groundbreaking for a Zelda game but good nonetheless.
You don't need to worry about stats, leveling, and so on. You just shoot stuff and see if you can get higher points on a level than your friend or family member did. You could also try to best your own score I suppose, but this game is best played with friends despite being single player. The game plays completely different from past Zelda games. Rather than being a free-roaming action-adventure, it's a third-person on-rails shooter. You just aim at the screen with your Wii-Mote and shoot crossbow bolts into your enemies. I suppose it would be fair to call it a sort of modern day Duck Hunt, but if you don't shoot the "ducks" fast enough they'll kill you.
The Wii Zapper that comes with the game is pretty much just a piece of plastic that you use to hold your wii-mote in a more gun-like fashion for you. That being said it's of solid build quality, you won't be breaking it anytime soon unless it's on purpose. I've heard people both complaina bout and praise the Wii Zapper for its configuration. It worked very well for me, and kept my aim steady. Plus, there's a very satisfying clicking sound everytime you pull the trigger.
A solid, if not a bit short, single player shooter coupled with a new plastic thingy to help you shoot at things better on your Wii, for under $25. I think the price more than justifies a purchase here, but only if you're a Zelda fan or plan on playign a fair amount of shooters on your Wii.