This is the best teeth whitening. I always had problems with sensitivity with the strips. This is so easy you just brush it on and it works.
This product was easy to use and lasted for several uses. You just click the bottom like a pen and the product comes out the top where the brush is. It brushes on the teeth easily and you're supposed to keep your mouth open around 30 seconds or more. I didn't notice that it whitened my teeth, probably because once you close your mouth it ends up being absorbed by your salive and swallowing. It's better to have a tray to keep the product on the teeth.
The pros:It works. Two applications and I can see a difference in tooth color. Good flavor, I like that the mint is subtle and not overpowering.The cons: My first application hurt my teeth really bad.I got pretty scared, rinsed them off after about 10 seconds.Thankfully the pain went away within 15 minutes, and I did see an improvement by the next day.I read up on the tooth pain and apparently it's common with many whitening products, and people just grin and bare it.Several days later I tried again and applied a thinner coat.Much less painful, just a little soreness.What you should know: it takes a while for the stuff to come out of the pen even after the first use.Be patient.