Yes, it's a minigame collection. No, there isn't any lag. And yes, it's actually really good. If you still haven't bought Kinect Sports over the last year, Zavvi are touting a £14.95 price point and a £4 saving compared to the next best offer from Simply Games.
It's a gutting shame that Kinect still hasn't fulfilled its true potential as a revolutionary peripheral, but hey, if you love minigame collections, this is a good one at a great price. Thanks to the legendary goonertillidie at HUKD.