A product that if you follow and correctly follow the instructions, taking care of course of products that have dyes like coffee, you will see results. It's not like at the dentist's office, no, but it's worth its money. I've had it for a while and I continue to use it, and I will continue to use it.

I have bought it twice. I was completely satisfied and maybe I will buy it again in the future. It made my teeth very white.
I find it strange that I see negative reviews. Obviously, if someone smokes, drinks coffee, and doesn't brush their teeth, they won't see a big difference because all of these things immediately penetrate the enamel. If you have such habits and yellow teeth, it's better to get teeth whitening from a dentist.
Also, if your enamel is naturally yellow, it cannot be improved much.
Many factors come into play.

Full set that lasts for 1 month. Unfortunately, it was a wasted month.
Initially, I started with the pen according to the instructions, which vaguely did something (but it burned the gums where it touched). Very temporary result, of course. In 2 weeks, it ran out (easily) and the continuation was simply nothing! The gel light was just a joke.
The worst part was that my lips and gums started peeling internally, and the toothpaste contributed to this, which I stopped using in less than a month and threw away.
I should note that I threw away almost all of it, as I had greatly reduced the amount I was using.

A lie. It does nothing. I faithfully followed the instructions for more than two weeks, but I didn't see any results at all. The toothpaste caused an allergy on the edges of my lips. The result after brushing lasts for only a few minutes. The pen is perhaps the only thing that does some work, but the material inside is only enough for 14 uses, if even that. Still, it only provides a temporary and purely visual effect. As for the gel with the supposed LED light, forget about it. A huge lie. I don't regret spending my money, as the amount is indeed small. I regret the time I wasted every day following the program it claimed. I do not recommend it to anyone.

It provided whiteness to the two central teeth, however, it did not remove the yellow shade from the canines. It does not deliver the whitening result that it promises for all teeth.