Look, I have had the WORST stains around the tops of my upper teeth for over a year (courtesy of my coffee and tea drinking habits). I had multiple electric toothbrushes (my mom even bought me one for Christmas, I was that desperate), every fancy whitening tooth paste, white strips that just straight up burned, even got my teeth scraped by my dentist and nothing seemed to help. It was so embarrassing, I knew people saw it and I hated smiling with my teeth because of it. I finally broke down tonight and decided I was going to fork out money for a bleach kit (I never wanted to because it never seems like they work or just cost too much). Well I stumbled upon this Plus White kit, super cheap, and so I said you know what...screw it, it has good reviews and I clearly I have nothing to lose. I left the gel on for 15 minutes, Rinsed it off, smiled...Gone. The stains are completely GONE!!! I don't know what I expected, maybe just just seeing my teeth a tint lighter?? But not only do they look WHITE, this gel completely removed what's been a huge insecurity of mine after ONE use... So yeah, I about cried! I can't stop looking at my teeth now haha!