I've been doing it pretty much daily for a few months now and plan to stick at it for a year (may as well, it's not much effort). As far as results I shed a lot less hair and my scalp is noticeably looser and there's less sebum/greasy hair which to me feels like a positive sign but as for regrowth I haven't seen anything yet. After a year I will probably decide if it's worth sticking at it. If I'm regressing by then it's surely not worth it, but if things have stayed the same then I'll keep massaging and hold out on the chance that it's slowing the hairloss.
The theories make a lot of sense though and sites like Perfecthairhealth.com present it in such a scientific/fascinating way that really make you believe that they could be onto something. That said I am dubious about the small number of documented success stories so can't help but wonder if massage is not quite enough to reverse the calcification. I do think that it could slow down the male pattern baldness progression for those with less aggressive balding and help alleviate other scalp issues that contribute to hairloss.
Ultimately it's one of those things where you just have to try it to find out. At least it's free.