I bought the original Kinect, and I bought an Xbox One after the Kinect was no longer mandatory but I later bought a separate Kinect for it. It has moments of transcendence and a lot of failures between those moments. There's a handful of games where the Kinect sensor really makes sense, and a lot of games where it was shoehorned in and wasn't fun. The biggest problem is that it requires a lot of space. It's a pain to set up, and often a working setup doesn't work for the rest of your life, so you have to rearrange furniture every time you want to use it. It's an interesting piece of tech, but it never really got to be easy enough to use to be what Microsoft wanted it to be.