It's a bit of fun but I really struggled with the kinect in my small room. Kinect 2.0 is better width wise but when doing the rock climbing, it just cant see my feet and arms at the same time
If you play on your own I wouldn't bother. If you play with mates or family then I can see it being a good bit of fun.
£50 though is a lot for a game you will just pick up now and then and not really put hours of gameplay into.