Review title is Durable and Amazing Results [SEP] I bought these because you know coffee stains. After drinking coffee for years and not brushing my teeth when I was done drinking coffee for the day had taken a toll. I wish I had taken before and after pictures because there was totally a difference and people cannot see my coffee addiction on my teeth anymore. They are easy to use and unlike some other ones I've tried the whitening strips did not hurt my teeth. These strips were very durable and came with such better instructions than the name brand ones I have tried before. I highly recommend these and you'll be surprised at the difference they make in just 2 weeks!