I use it when I make BBQ sauce and I can't imagine ever drinking it straight.
When I get stiff body parts I always soak it in cider.
I can say that when I was in Central America had kidney stones and no doctors within driving distance.One of the locals that was working the Pipeline with us told me that I should drink some vinegar to soften the stone. I'm not sure if it made it softer but it sure made it easier to pass it.