I read many of the reviews and was ready to cancel my appointment! I decided to keep the appt. and am very pleased I did so. There were 4 sessions, each lasting 15 minutes. The first 3 sessions were ABSOLUTELY painless. The 4th session had a few seconds of discomfort, but nothing like others described. The dentist and assts. said to tell them immediately if there were problems.
I had some discomfort afterwards for a few hours, but again, nothing too bad. And, I am not known for having a high pain tolerance! I'm happy with the results and would recommend this.