A little disappointed
So this doesn't work. The flaw is in the mouth tray. It's slick and flat. The tray needs to have better indents to hold the whitening product. As soon as you put the whitening gel on and put the piece in your mouth, the gel slides down and ends up not even being on your teeth. I even tried with putting the whitening gel directly on my teeth and then sliding the tray in and it would do the same thing. Since the surface is slick and straight as soon as you put the tray in your mouth and your teeth hit it, it pushes all the whitening gel to the bottom. If the tray had some type of indents to keep the gel in place on your teeth then I think this would work. I used this for a full 7 days straight and because of this defect/flaw in the tray, my teeth were exactly the same color and not even slightly whitened. I wanted to return it but I couldn't since I had tossed the plastic wrap that has the scannable bar code. I would recommend getting a different whitening kit, one with a better tray so the whitening gel stays on the teeth like it's supposed to.
Rating: 3 stars