Yeah, I agree about going all in at once. I think a lot of the body works on a kind of 'weight' of signals, so the switch to start growing is only turned on if growth factors outweigh inhibitors. Balding guys have a constant stream of inhibitors hitting their follicles, so to overcome this, perhaps all at once treatments prevents any adaptation and subsequent down weighting of these growth signals.Pretty good. Nothing really special about his routine. He is just on Big 3 / Dermaroll 1.5mm weekly. The one thing that he had going for him is he went from nothing to full on attack mode. Where a lot of us added this ammo slowly overtime so it wasn't as drastic. Either way, great results.
I'm currently doing the same regimen, except doing 1.0mm once every 2 weeks since I've buzzed me head. Not sure which frequency or depth is better at this point... hair hasn't changed much in the last few years.