I'm pretty obsessed with my teeth. As soon as I got my braces off I asked my dentist if I could us whitestrips and he said they were safe as long as I kept them off my gums, so I did, and I noticed a huge improvement, I used the 10-day Premium Set. I now brush my teeth for 3 minutes in the morning and night with Crest Vivid White, and before brushing I have a Listerine pre-brush mouthwash, and after brushing I have a regular whitening mouthwash that comes with it. I dont think theyve made my teeth much whiter, maybe a little, but its certainly kept the white colour the whitestrips gave me around a year ago!