Well, I have not tested them. I guess they are mostly in USA.
They seem to be copying mostly successful diabolo designs, and they will be probably fine for any beginner/medium level. In 3 diabolos the difference may be more noticeable.
What are the other alternatives you have and what are the prices? I am curious how the thing looks from USA perspective
@hunterthompson: that website in your signature is not related at all with diabolo, and it could be seen as advertising, mind removing it?
That said I had never seen such service... god I'm getting old
