I have had reports from 3 different people using these so far. I can't tell you that there will be no troubles, but none have been reported to me so far. The original auction has run out, but I have been told that there are still more controls available from them.
Good luck, and let me know about any problems that you may have. I am still working on the single point threading for the plugin, so don't plan on using that very soon, but I'll get it eventually.
Regards,
Kenny