Excellent product for its price.
It applies easily and does what it promises.
Certainly, someone who has very yellow teeth will not see a difference because they need something stronger and more effective, but I, who do not have yellow teeth, saw a difference immediately, after just 2 uses.

Waste of money, it does absolutely NOTHING! It leaves an aftertaste on the teeth similar to Turkish delight (or gelatin if you prefer) and I have to rinse them off!

It's not worth even trying, I couldn't even place the strips on my bottom teeth as they melted too quickly and stuck to my teeth. I struggled to apply one strip to my top teeth, which not only didn't come off but also came apart into a thousand pieces. Of course, there was NO RESULT at all.

Very good, they don't work miracles but you will see a significant difference. It's not comparable to whitening but they help. Tip: put saliva on your teeth or on the strips beforehand to easily stick to the teeth

I use the films every day for a few days now, taking photos daily. The difference is not crazy, but they have whitened some tones. For their price, I believe they are worth it.