Sure, it's a super delayed review, - this game came out forever ago - but I just got it via GameFly. Here are my thoughts on GH:VH.
Graphics: 3.5/5 Meh. The main thing that bothers me about the graphics, although it's not so much the graphics as it was Activision/Never Soft's choice, is that the members of the band are OLD. Rather than take on the late 70's/early 80's appearance of the band, they did what they look like now. I'm sorry, but to me, that's just stupid. Graphically though, this game's about average. The model movements aren't anything spectacular, the game doesn't look really any better than Guitar Hero: Metallica... it's nothing that will blow your mind.
Soundtrack: 3.25/5 Meh as well. There are flaws on top of flaws involving the soundtrack. First, as everyone should know by now, there are a number of bands in this game that have zero relevancy to Van Halen. Let me list a few: blink-182, Weezer, Foo Fighters, Fountains of Wayne, Yellowcard, among others. Uh. Hello? What the hell are bands that weren't formed until two/three decades after Van Halen in the game for? Another massive flaw that may be worth noting to fans of Van Halen - there is no Sammy Hagar in this game at all. Not as a playable character, and none of Van Halen's tracks from his time in the band are included in this game. That doesn't bother me any, since I'm not a massive Van Halen fan anyway.
Fun: 3.25/5 Meh for a third time. Guitar Hero: Van Halen is average at best. Shredding some Van Halen classics and whatnot may be fun, but only for so long. For just about every Van Halen song, you've got a Lenny Kravitz, Alter Bridge, or Tenacious D song to play afterwards, making this game quite the disappointment. Guitar Hero: Van Halen may appeal greatly to hardcore fans of the band, but outside of that, it's just another game to rent, get the achievements for, and then dump off at your local Blockbuster or mailbox.