I was lucky enough to receive a box of Crest® 3D White Professional Effects Whitestrips from Influenster.com to try out and review, and just four days into the whitening "program", I am amazed at the results already! My teeth are already several shades whiter, and I can't wait to see the results after I have completed the 20 days of usage. These strips have a wonderful "seal", so that you can even drink water while wearing them. I can actually talk while wearing them, too, without fear that they might flop off mid-conversation, grossing out the nearest passerby. LOL!
So far, these are simply awesome - I will post my final review once my 20 days are complete!