I know several people that take CBD w/o any THC for anxiety or other things and it seems to work wonders for them. I also know a few people that seem happy with it for joint pain. However, for myself, I've noticed that pure CBD doesn't really seem to target muscle relaxation or deep muscle pain. However, just a little bit of THC aids in that and makes a world of difference.
Plus, THC actually has its own anti inflammatory property so paired with CBD it works really nice on inflammatory conditions.
One of the main reasons I'm growing is thc oil is illegal here (oh irony) and you can get a prescription for 1 type and 1 type only if your GP is willing to prescribe it. Mine isn't and I've heard it tastes like shit anyways. And, the pharmacy prepares it for oral administration vs. vaping and I've noticed that vaping thc oil really deals with the pain where ingestion not only takes quite awhile but also the high stays too long.
I've become a big fan of MMJ this past year since it helps with pain like muscle relaxors don't and it doesn't interfere with my life the way the heavy pain killers do (like not being able to drive several days after taking 1 tramadol).