I'm doing just that since I bought Guitar Hero Metallica! Took me a while to get it, but the damn thing was so expensive that I didn't want to buy it, until I talked with a guy at my job who has it and the way he had to tell me about the songs in the game and everything, I just HAD to get it. After the small disappointement that World Tour was due to the relatively very easy gameplay and lack of great guitar tracks compared to the previous GH titles, I'm glad I did this purchase. It literally brings me back to GH1, 2 and 3 with it's complicated solos, complex riffs and everything, only it's all about Metallica which isn't a bad thing since they have a lot of good songs. Of course, there is a lot of other bands in there as well such as Lynyrd Skynyrd, System of a Down, Alice in Chains, Motorhead, on and on since I don't remember most of them. Primarly though, there's a whole lot of Metallica and they were able to choose pretty good songs by them.

And in response to navigata's comment, I'll check if I can rent it or if it'll play on TV before buying it then, after all, it has to be pretty hard to top animated movies such as Ice Age.