Root cbrown towns aren't bad at all, they numb you up with injections before the procedure, so you don't feel anything more than a normal filling.
Then after, there's no nerve left, so there's not much to feel pain. I got one, they gave me a 7-day or so prescription of vicodin, I got it filled but never needed any, there was no pain afterwards.
It's just a long, boring (and expensive as hell) procedure