Many CBD oils are completely free of THC, which is the psychoactive cannabinoid in marijuana. I get a shot of CBD in my blended coffee drink from a local cafe truck, and trust me, the only zip is from the caffeine.
I've heard that some CBD oils have trace amounts of THC, but I don't think those would be legal everywhere.
Re: legality, it was ridiculous that (0% THC) CBD oil was ever illegal in the first place since it's not psychoactive. For a while in Georgia (and maybe still), the law was written in such a way that a hemp t-shirt would have been illegal.
Also regarding legality, I'll (maybe) accept that marijuana should remain illegal when the politicians who keep it so all give up their coffee at breakfast (caffeine, a drug), their dinner wine and after dinner scotch (alcohol, a drug), and their stogies at the men's club (nicotine, a drug), not to mention assorted nerve and pain pills.
Cannabis is known to help a variety of problems, including arthritis, which I have.
I love this Adam Ruins Everything video about marijuana:
Pro-Pot and Proud