This works tremendously for increasing absorption of topicals, such as minoxidil. For the first time since my early twenties, the natural part in my hair has reappeared. I never thought I'd see it again. Also, my hair where it's been needled looks much more luxurious and shiny.
And where the Retin-A/minox combo has been a little slow to grow hair density, basically my crown, needling has helped to fill in nicely. In fact, needling has also helped to grow more little vellous hairs along my hairline; and at this point, it's not even like my hairline is that lacking in density.
As far as the needling procedure itself.... yes, it's slightly irritating and can be a little painful at first. But after a while your skin adapts, and you become used to the whole procedure, in general. I definitely recommend that anyone gives this a shot with their minoxidil treatment. Just make sure to always keep everything sterilized to avoid infection.