Well, I've had two, one molar & one up front. The molar worked fine. Put on a temp cap that day & a ceramic cap a month or so later. It's worn in fine & I don't think about it at all.
The one up front, upper left side, second from the centerline. Got brittle & the tooth broke off a couple of weeks later. IMO, they screwed it up. Just had the root pulled by a dental sugeon (easy) who's going to put an implant in. The original "dentist" wanted to grind down two perfectly good teeth, one on either side & make a bridge. An implant basically uses a titanium self-tap screw for a root & glues a ceramic tooth on top of that. It's supposed to last forever.
Neither root canal hurt. More pushing & shoving than anything. Once the novocain wore off, it was just some dull throbbing. Asprin took care of it for me. Not as bad as some people make it out to be. Alcohol doesn't really help, just drags out the healing process & gives you the joys of hangovers in addition.