These work so well! I used a whole box, and over a month I received more and more comments on how white my smile was, and to this day my teeth are shiny, white, and all thanks to these whitening strips. Definitely buy these!
This is a very good product My face feels so smooth I'am so glad I bought the replacement brushes as I don't want to stop using this for a minute. I highly recommend the Oil of Olay cleansing face brush and get the replacement brushes at the same time.