This isn't the best in the series, but it's still another good step in the series.
The characters are a bit flicky in some ways, and the CD things on the song menu's should be more detailed, but the lines where you strum are plain fine.
Gameplay:
For newcomers, it isn't really great at rocking unless you have headphones. For fans, you will feel both the same classic strumming in a good way and a bad way.
Audio:
The audio is still like what you see in the games, which is a good thing.
Lifespan:
It really depends whether you like the series or not, but it will probaly be good for only a month's purchase.
Final Words:
Depending on being a fan or a newcomer of rock to the game, you should be better of with Guitar Hero III, but it still fits if you want it anywhere at anytime. You can play it more easily now, and it's still a good edition in the series.