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Review title: total waste of $40
Product review: 1) The trays that come with this product are thin and the edges hurt my gums sometimes.2) Trays do not cover the back of your teeth, hence they do not get whitened -- but they should.3) the "gel" has the consistency of play dough. It moistens in your mouth but not entirely. Even after an hour, I have taken the trays out and had some parts of them in pretty much the same shape. This is after smushing the tray against my teeth.4) an hour is a long time for a product that doesn't work. I used Rembrandt trays and after each use of those, my teeth were whitened more than a week of these.
