Im interested in it but I've yet to buy one. I'm super fidgety and if it was just a minor annoyance to others, I would be happy. But unfortantely its not, one of my worst habits is hair pulling (trichotillomania). It really damages my hair and makes it a sad mess, I have to restrain myself from giving myself bald spots on my head.
http://www.stimtastic.co/ Theres a couple things here that look interesting to me, even though they are for literal autists. Pic related looks fun. I also really like how those little bean/edamame clickers look.