Yeah, I bought KR about a year ago and I have never used it. I thought it would be a totally awesome and new way to levitate, and trust me it is a cool method, but I have never found a practical use for it. Levitation has never really fit into my own routine so it doesn't fit with anything I do. If I do it, the effect is more like hey look what I can do. I'm not really like that.
Over all I think it is a good effect and method in thought but not very practical.
Orin