“I was a little skeptical about purchasing this as I have some sensitive teeth, but let me tell you this does not hurt my teeth at all. It is easy to use and very simple. I love the ingredients in the gel too. The only issue I had was the applicators that hold the gel are a little cheap and sometimes the gel comes out really fast even when I let a little air in. That is the only issue I had other than the fact that the gel when used daily goes very fast, so you will have to constantly be buying more. But I love this teeth whitening kit and I would recommend it to anyone looking for something that does not make your teeth sensitive!”