Ouch, should be called Gum whitening.
Painful, ouch.  Virtually impossible to avoid getting it on your gums.  Not pleasant trying to wait 10-20 minutes, which is the time suggested.  When removed and rinsed, the pain continues for about 10 minutes, then your gums are white for about an hour, then your gums feel better in about 5 days, after having to delicately brush your teeth and skin peeling away.  Worst of all my teeth did not get any whiter, not even 1 shade on the chart after two applications.
Rating: 1 stars