I have been lightened with another very expensive product of Ladent my teeth. In this case, a gel is filled in a rail and rail borne these overnight in the mouth. This has brought good results, but was schwirig in the application with me, the tracks did not fit well, the gel did not remain on the teeth ... These strips are much more favorable, bring similar results after repeated use and are so much easier to use. I'm very happy with it.
