Did anyone purchase this yet? I wanna know how it is. Is it worth buying or should I wait for Guitar Hero 4?

I, personally, haven't played it but I would recommend you waste your money on something else instead if you own any of the others. What's the point?

It is worth buying, particularly if you thought that hard mode on GH3 was too difficult.... As this review points out if you want to read up more: http://www.itreviews.co.uk/games/g473.htm

I'd say avoid it. i think this review captured it best:

http://www.poweredupgamers.com/index.php?option=com_con...d=1:reviews&Itemid=4

if you don't mind that it's a bit pricey for 40 songs and if you like Aerosmith mid-tempo grooves, buy it. Otherwise wait for Rock Band 2 or the new Guitar Hero.
I enjoyed GHA very much, but lost interest once I did all the songs.

This one really comes down to how big of an aerosmith fan are you?

If you like one or two of their songs, you can skip it, but if your a big fan its worth picking up.

I love the wireless guitar that is packaged with it too.