Got em out about a year and a half ago...i forget where i went exactly, but I think it took about an hour. Went in, went under and then I just felt tired afterward. Lots of rinsing w saltwater after eating, and whatever other tips they give..   
Got all 4 removed. Had NO pain whatsoever and was just careful for a few days because of hearing dry-socket horror stories..   
Back to normal pretty quick