I bought this set because I wanted to play Guitar Hero World Tour (4) on PC. I had already bought the xBox 360 guitars for GH (the Xplorer model) and, playing (real) drums for 8 years now, I wanted to give it a shot.
Using Guitar Hero World Tour on Windows Seven Ultimate, I just had to plug the drums and everything was already set up : no additional drivers or software to use.. Great ! Looks like Seven is fully compatible...
In the Guitar Hero games, you have 5 colors + the kick (2 cymbals and 3 toms). On the Rock Band kit, you only have 4 toms, but the game is fully compatible with the RB drumset, and it automatically converts the 5 colors to 4. The only thing rough about it is that some of the breaks are then between two colors that are too far from each othern making the break impossible to play without missing a note... But I only saw this in 2 songs, so no big deal at all.
To sum up : great purchase ! I love it, and so do my friends ! The only thing I regret is that, for some of very tough songs in the game (from Tool, for example), it looks like the game designers didn't really properly listen to the songs, because their adaptation is kinda rubbish (I play them on real drums, but absolutely CAN'T play'em in GH, it's so wrong...!)
ps: just to clarify, this is the drumsset from Rock Band 1 (one), and the cymbals addons (I wanted to buy :/) that you can find are only compatible with the Rock Band 2 (two) drumset... Too bad !