Sensitive to the light.
The product is easy to use and comes with a lip protector cream, however it did not protect my lips. I put on before each application as instructed and by the 4th time my lips were burning. You are supposed to do it 5 days in a row, I could only do two, my lips hurt too badly and started to peel. The protectant did not work for me. As a downside, I saw no results because I could only do two days worth.
Rating: 3 stars