I really like mine. It is a great tool. (Please note I said tool.)
It is not a trick, and should not be thought of as a trick. You can do a lot with it, but it is you that has to sell it. Like a lot of thread stuff you need a reason why things float or move. If you just say watch this float. Everyone knows it is attached to something. Now, if you talk about teaching a card a cool trick. (like a dog) it may sell bettter.
The DVD shows some cool stuff you can do with it, but I found the best stuff is the things I think up.
I have been playing around with it with my cups.

I have not got it just right yet, but it can mess with people. (don't ask, you need to find it by yourself) You will feel better about it then. (hell, what do I know.)
just like any tool. You need to learn how to use it, before you can really use it. Take your time with it. Keep it on you and try things here and there. I am not saying go out and try and put on a show. I am saying it comfortable with it. Then start trying to think up your own stuff. (this is all just my two cents.)
Till next time,
Sean