Review (5/5): No pain for me!
I know many people have complained of tooth and gum pain, but this is my second set (I used them 2 years ago) and I have never felt even the ugh test tingling and I follow the directions. My only complaint is that they taste bad, but if you have Invisalign or clear retainers that form to your teeth you can put those on over the strips and you cant taste them at all and it holds them in place so they won't slide and talk funny. Great results. Certainly a wise investment. 2 years after I used them the first time I was still getting compliments on my white teeth.