We just gave this to our two boys (2 & 3.5) two days ago for Christmas. They get a little nutty in winter when it's too cold to play outside and hoped that this would channel some of their energy. So far, it's been absolutely wonderful. We have it setup in our basement and it's a breeze to turn on. We just press a button and within a minute the thing is ready. The boys love to watch it "grow". It took a little while for them to figure out how to climb up the slide without assistance (barefoot is best) and they've been having a blast, often asking to go downstairs to bounce.
It seems well made and solid. Having had it for only a few days, it's hard to tell how well it will hold up, but it seems like it will last us a long time.
They seem to enjoy it most when they're playing together or when we interact with them while they're playing.