This was another bargain purchase for me. Ten dollars on Amazon during one of their Gold Box sales. I'd have to say it was well worth the price.
I remember when this game came out it got all sorts of game of the year awards on G4 and such. After having played it through I can say it isn't THAT good, but it is pretty good game, and one of the best Wii games I've played. However, if this were a PC game I would only consider it to be mildly above average compared to other PC shooters like Half Life 2. The movement controls are atrocious and the ugly, muddy palette is so 1998. You do get used to the clumsy movement after a half hour or so. I was willing to deal with the tank controls because, on the other hand (literally), using the wiimote as a shooting device works very well. Taking aim at monsters and zombies and blowing them away is very satisfying.