I got the game, and I must admit that I enjoy it
because I'm a psycho who likes shooting crap.
Graphically speaking, I couldn't see any real difference between it and Twilight Princess. Game play wise, it's a fun if you like shooting things, but it doesn't have any of the deep story elements of other LoZ games. But that's to be expected, as it's just a quick little game to get you used to the Zapper setup.
Ultimately, getting the game hinges on whether you like shooting games or not. I'm just hoping that there's going to be a Duck Hunt 2