Anyone who enjoyed the original game won't be disapointed with this, especially as the original game and the sequel is included on this disc. So even if you don't like the new version, you can still play it the old way.
My brothers and I used to waste huge amounts of time playing this together on our old Amiga and it's still a great game to play with a friend on the Wii. Everything you loved about the old game is still here, the format has not been changed a great deal. The main difference is that you can climb on the front of the buildings as well as up and down the sides and you have a couple of basic special moves and some complex ones you learn as bonuses. The camera zooms in and out automatically and is quite well controlled, it doesn't distract or annoy. It's a little bit harder to knock the helicopters out of the sky and pick up cars and people, but once you get a grip on the moves it gets easier. You can play this game without a nunchuk, but it's much more difficult to move your monster around and I wouldn't recommend it.
The best bit of the game is picking up a bus or tram, tipping it up to eat all the passengers then aiming and throwing it at a building where it explodes causing even more damage.
This game is similar to Eledees because it appeals to the destructive element in us all, but has a fairly simple concept and it gives you a certain amount of freedom in the environment to do what you want. It doesn't have as much lasting appeal as a single player game and as the other reviewers have said; it's good for a few rounds of therapy but I think it makes a great multiplayer game for people in a similar state of mind.