So I was super pumped to get a $10 manuf. coupon, PLUS a $10 electronic coupon for Kroger (you can stack them) for the new Crest 2 hour Whitestrips. I haven't whitened my teeth since before my wedding, so I thought I'd give them a whirl.
You wear the strips for 2 hours. There are 4 treatments, and you do them once every 3 months, so the box is for one year. I was excited about that, because I HATED the ones that you wear for like 14 days straight. I'd rather get it over with. (And, I'm too cheap for Zoom whitening, or whatever they do at the dentist).
So I did them last night, and I can defintiely tell a difference. But OMG--my teeth are throbbing today! It is bizarre! I do have sensitive teeth to begin with, so I should have known better. (DH tried to stop me!) But the box said that sensitivity caused by them is temporary, and yadda yadda.. and I use toothpaste for sensitive teeth, so I thought I'd be ok.
I really hope it does proove to be temporary, because it is quite uncomfortable.
So if you're contemplating these, and have sensitive chompers, beware!

Re: NBR: Beware of the new Crest 2 hour Whitestrips.
Life at Chunky Gal