I got it for Christmas, and it's awesome! The gameplay is unique, because combinations of swinging the Wiimote and hitting different buttons constitute different attacks and combos. The environments are stunning, although the degree of realisticness is not quite perfect. Trashed buildings sink into the ground, leaving no rubble. But unless you're someone who's obsessed with realism, you'll love the environments. The story mode is pretty in-depth, with different story missions for every monster, and even then they're not all the same. There are lots of unlockable characters, too, making replay value high, until you unlock every character and beat story mode with them. Even then, it's still a fun multi-player brawling game. I wouldn't say it's as good as Smash Bros, but it's a solid game, with engaging play and replay value to spare. I recommend that if you have a Wii, and 50 bucks, pick this game up, even if you're not a die-hard Godzilla fan. Here's some screenshots of the game:

(Unfortunately, they contained the address of a site with forums)