Definitely my favorite Guitar Hero game by far. The songs are amazing! Unlike the newer GH games, the hammer ons ACTUALLY work, the graphics are pretty decent, and there are plenty of songs that you'll want to play over... and over... and over...
The graphics are awesome, but I definitely think this game is way over rated. It's definitely over priced. Let's face it, all you do is run forward and use different melee attacks (basically pressing either Y A or B repeatedly). It's definitely a very good looking game, but it's not really worth it.
Ehh 1 vs 100 is pretty decent, it's fun with friends... but I swear the answers aren't always correct. Plus having commercial breaks and a faux audience is a little annoying
Well, ODST is entertaining, but there's really only so much you can do with the game? Yea, you can play the campaign a few times but then it'll get old, so you move on to firefight... which is basically like horde on Gears of War 2. Firefight will be entertaining for a while, but once you play it on all the maps... there's really no point in playing it again. The main reason why I'd suggest adding Halo 3 ODST to your collection is for the new multiplayer disc (which is literally Halo 3 minus the H3 campaign), the new maps (especially Heretic) are pretty awesome, and having them all on a disc instead of downloading them (which you can't do, at least not yet) cuts back the loading time by a LOT. You no longer have to sit in a lobby waiting for 5 minutes for all of your maps to load, you can just put the game in and hit start searching.
pretty decent game, good graphics, fun campaign... but the multiplayer is embarrassing. NO one is ever on so it's practically impossible to find a match. =/