Teeth unevenly whitened
The first issue with this product is the whitening tray completely folded in half when I put it in the boiling water, and I very closely timed how long to leave it in the water according to the directions.  This made the tray not usable.  The second issue is that it is very harsh on the gums.  And the third and most frustrating issue is that this product unevenly whitened my teeth.  It is splotchy and I don't know when this will go away, it's as if there are white lines across my front teeth that are very noticeable.  I followed all of the directions exactly as described.  I am very frustrated and would return this product if I could.
Rating: 1 stars