These reviews scared me so badly I almost canceled my apointment.
It was absolutely pain less, the worst part was sitting in that chair for over an hour with all of this stuff in your mouth. You can obviously feel your lips getting hot, but what do you expect with a UV light on them for an hour, with just thin protection over them?
The results are noticible but there not overly white either.
I had someone buy this for me as a gift, if I were asked to do it again, with myself paying, I wouldn't do it. I had it done just under 24 hours ago now, apparently they'll keep getting whiter still.
Overall, painfree, but I'm not sure if it was worth it.