I have the Wii version. Bought it the day it came out, OCT. 27 2008. Like someone else already mentioned, the single player is dissapointing. Well it's not bad, it's just that I found Guitar Hero III more interesting and with better songs. Not to say that GHWT has bad songs but GH3 had more likeable songs. At least for me. Many songs on GH3 where the type where you'd play it, finish the song, think it was pretty awesome and want to try it again. A lot of the songs on GhWt, are songs and bands I'm not familiar with. Nor in my bias opinion are they songs that give me that, "LETS PLAY THAT SONG AGAIN!! feeling. Only a small handful like Van Halen's Hot for teacher, Beat It and a few others. This could be because there are so many songs that the great ones are minisculed by the amount of regular songs.
I didn't buy the Guitar set. At first I regretted not getting the new guitar, but now I'm glad I didn't. You don't really need it. You can still play every guitar chord without it. What I do like about World Tour this time around you can do a career mode out of each instrument. Unlike GH3 you can only do career with Guitar. On World Tour you can do one for Guitar, Vocal, Drums and finally Bass. I didn't like how on GH3 you can only play Bass if playing with another person or playing on practice. You couldn't play it on career or quickplay.
While the single player isn't as exciting as GH3, it is rather fun to play.
I actually like the song studio creation. Well not for me, cause I couldn't write music even if I was mozart's decendent. But I do like what other people are starting to do with it. Mainly I like that they are getting some of the cooler video game theme songs and converting them to play. They're free to download. Some of the rather fun ones are the super mario bros theme, chocobo theme and megaman songs. You can play them as a band too. i'm still trying to figure out if you can play them online with friends.
I bought the microphone for the game and even though I suck at singing, it can be pretty fun to try out. I just don't like that even though the mic doesn't use a wiiMote to connect, It still requires a free Wiimote to navigate through the menus. And if you have the wiimotes connected to guitars, then the mic becomes unusable. So you need an extra wiimote just for the mic.
The only thing now that really keeps me interested is the online band play. You can host a band or join someone else's online band and rock out together. So far I've only played with other people who use a guitar. But you can play any instrument as long as no one else on the other band is playing that instrument. This time around just playing a song, career, quickplay or online band mode, you receive money for the gig. So you don't only have to play career mode to buy guitars, costumes and other accessories from the rock store. But you do have to play career mode to unlock players and costumes and accesories that can later be bought at the store.
I found the game as a whole a bit dissapointing, but after playing for a while it's starting to grow on me. definitely thought it was worth buying it. I'm just glad I didn't get the new guitar or the whole band set. The new guitar isn't neccessary. And I've been hearing that 90% of the drum kits are having problems. I'm gonna wait for the 2nd generation of drum kits or a third party drum kit. Those should fix all the nasty problems the current drum kit has.
And last but not least is the buy and download song option. Right now they only have like 10 songs to download. Some are good like Jessies Girl, Hot blooded, American band and a few others. They're only 200 wii points per song. That translates to $2 US dollars per song. I'm hoping they'll release a lot more new cool songs to help fill the void of regular songs on GHWT. I guess if you liked GH3, you should like this one. I can't compare to Rockband 1 or 2 since i've never played either of them.