This system has so far performed much better that I expected. I am 60+ yrs old and a heavy coffee drinker, so my teeth were very discolored. I could see a noticeable improvement with the first use and after 3 uses thus far, there is a significant whitening of my teeth.
I am only able to use the trays about every 2-3 days as my teeth are very sensitive and, of course, teeth whitening aggravates that. One tip for others with sensitive teeth, my hygienist told me to follow up with ACT mouthwash as this offers better protection of nerve endings. It does seem to help.
The tray system is VERY convenient and easy to use. I do find that drying the teeth off before application as recommended, makes the trays adhere better.
At any rate, even after only 3 applications thus far, I am well pleased and will purchase another for once a wk use as soon as I am finished with these five.
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