There is also a difference in CBD oil obtained from a medical marijuana dispensary, and the ones purchased online . They are not the same.
I have read a fair amount about this and know a friend who has used it with success after recommended to them by their chiropractor. I agree though that it is probably different for each person in terms of whether it helps or not. Also, dosing and how to use is always a question because it is not really regulated or 'officially' studied at this point. So, the recommendations are anecdotal which means you don't know if you are getting the best info. Also, are you talking about taking it orally in pill form or the kind you rub on for pain?
I know some have gotten mild relief, while others have gotten none. It seems to effect everyone quite differently.