I knew what to expect from this one (after all it is JUST a track pack), but as a fan of AC/DC i couldn't resist!!
Bright side: The songs are a LOT of fun (as i said already), especially if you are playing with four people!! They are not that hard.. in fact they are pretty damn easy compared to other games, but still a lot of fun. I think every song in this has one of those big finish parts where you can go crazy on the instrument and get a lot of points, and it's so fitting, because AC/DC songs deserve that! They are all from a live show, so they are very different versions of normal recordings.. for example, Highway to Hell starts with an awesome guitar solo, and Jailbreak is a lot longer, with a few guitar and drum solos thrown in the middle. The fact that they are all live also means the singer is Brian Johnson, which isn't bad, but a lot of songs like Jailbreak sound so much better with Bon Scott singing them, so it is kind of disappointing..
Another good thing though, you can use your GH:WT instruments, so if you only have those and are an AC/DC fan, get this game!
Down Side: It's just a track pack... that's the biggest disappointment... i mean come on, its AC/DC, when the hell are they going to get a Rock Band or Guitar Hero game fully dedicated to them! Also, for the wii version, you can't put the songs from this track pack into your Rock Band or Rock Band 2 game like in the Xbox and PS3 versions, THAT SUCKS!!! I mean, sure the songs could have been a lot better, and they could have put in a couple more songs, but i still love AC/DC and would like these songs in my Rock Band 2 game!
So yea, as you can see, im kind of in conflict with my feelings towards this Track Pack.. i say if you are an AC/DC fan, its definitely worth it, and you are going to have a hell of a time.. but if you are not, don't even go near this, you will be disappointed.