I did for a while, mainly for sleep, as it makes me relaxed/tired. I have used during the day if I am feeling anxious, and it works.
I have not, although I keep doses pretty low. I have read it is anti-androgenic though, so be cautious. I have also read it is very useful for balancing out the endocrine system.
Yes, I have back pain and leg pain mainly, but pretty much aches all over during downswings.