I tried this because my teeth were stained bad. It has a chart showing the whitening levels. The tray was so awkward in my mouth and I didn't see any noticeable results.
I love this system. I saw results super fast. It did not taste bad and price is great. I also like that there are no strips to remove.
These reviews are the subjective opinions of ChickAdvisor members and not of ChickAdvisor Inc.