First Time Use.  Not bad...
Another reviewer stated that these are messy.  I have to agree!!  Taking the trays off my teeth was pretty unpleasant (had the bleach gunk all over trays, hands, etc).<br /><br />I'm using the 7 day treatment, and timing each one for 30 minutes, because of some prior dentist's prescription that was for my gums.  One reviewer of the 14 day white tray system said their gums bled after they used the trays.  Observation:  If your gums are bleeding, it's not the white trays; there's an underlying cause someplace.  Thankfully, my gums are just fine after my first experience with the trays.  My suggestion is to go for the LEAST TIME you can stand it.<br /><br />I did use the 'pro gentle' toothpaste that comes with the kit BEFORE I applied the trays -and to be sure I got all the gunk outta my teeth, I brushed again with the toothpaste AFTER.  (Yuk!!!).<br /><br />The insert states that results may be seen in as little as 3 days.  If I do see considerable results in 3 days, I'm going to stop there.  if not, I'll go another 3 days (for a total of 6).<br /><br />Overall, it's not a bad system.  I've tried Crest White Strips and they were HORRIBLY 'bleach' tasting.  These aren't as bad.
Rating: 3 stars