Easy to set up and get going, we were playing this game within a few minutes - once we found the drumsticks, which are stored inside the cross-beam of the pad unit! Whilst you play the guitar straight out of the box, you may need to set the delay associated with the drum kit - this makes the striking of the pad match with the moment the little buttons shoot past the mark on the screen. It can be all out of synch until you do that and very difficult to play.
One thing that might put you off is the size of the drum kit but don't worry too much. The pad unit lifts off the two legs easily and they then telescope down and pull out of the base with ease. For storage, we have found that it all slips under our sofa once you have taken the kit apart in this way (a 1-minute job) and removed the cymbal pads. Alternatively, the pad unit can be used as-is, sitting it on a foot stool, chair or table so you don't need the whole kit sitting around set up all the time.
Now all we need is an extra remote so we can sing at the same time. Oh, and another guitar so all 4 of us can play together. Assuming you all like heavy music (we do) then everyone will be happy and have fun.
Rock on.