I've tried this to "test" how well it works. In my opinion, the o-t-c pill form is at best a placebo. Maybe I'm too young, or... it doesn't work very well post-processing.
I think that the major issue with herbs is efficacy post-sale off the shelf. Maybe Maca works best fresh, who knows. Until we can grow Maca and try it fresh from the garden or get someone to ship a fresh root, we won't truly know for sure.