I love how high quality these are! I compete in beauty pageants, and I am always looking for a way to keep my teeth white and bright! My boyfriend, whose dad is a dentist, recommended these to me! They are a little pricey, but definitely worth it! Also, they did leave my teeth a little sore, but not too sore that I couldn’t handle it. I love how bright they keep my teeth looking and how easy they are to use. I most certainly would recommend these to anyone looking for a quick whitening strip, as you can see a difference after just one use!