I received this product to try through the Product Review Club.

I have never whitened my teeth before and have some slight discoloration. The package comes with 4 treatments (a years' worth if you whiten every 3 months a suggested). My husband and I both tried them on the same night.

I will say that the box comes with almost no directions at all. There are two strips (upper and lower) in each pouch, but nowhere does it tell you which strip is which. I assumed the longer strip was for the top, so we went with that. It would be nice if both strips were longer so that they covered more of your teeth.

We ended up watching TV for 2 hours and having the strips on was very uncomfortable. They do stick to your teeth quite well, but there is some foaming action and I had my mouth open most of the time which felt weird.

I wasn't expecting Hollywood white or anything, but still I was disappointed that the results were barely noticeable. I did take before and after pictures so I could tell for sure - Crest should include a shade guide or something so that you can see how much whiter your teeth got.

After removing the strips I definitely had to brush my teeth as there was a lot of residue. Almost immediately after I finished the treatment my teeth started to ache. I normally do not have sensitive teeth (hot/cold), but they were painful, like after you have eaten something very acidic or have a toothache. My husband experienced pain as well and the next day it was uncomfortable to eat/drink. The sensitivity lasted about 18 hours for us.

I happened to have a dentist appointment this week and I mentioned the experience to my hygienist. She had never heard of a 2-hour at home kit and was skeptical of the results compared to office whitening. She also said that a lot of people have sensitivity after whitening.

Overall, I might try the rest of the strips in the box to see if I can get my teeth any whiter, but for the price and discomfort I experienced, I will not be going out of my way to purchase/use any more of these products.

I did not care for these at all. I was lucky enough to get a package to try through the Product Review Club. I found them quite easy to apply and the definitely stayed 'stuck' on my teeth. Perhaps it's because I don't have too much experience with teeth whitening but I thought these were very uncomfortable and tasted awful. It was very challenging to keep them on for two hours. I eventually made it through the two hours and removed the strips. They left a thick gel layer of gunk. I rubbed it off my teeth and went in for a closer examination only to find my teeth looked exactly the same. I'm not sure why but I could not notice any change. As soon as I rinsed my mouth with water I noticed the increased sensitivity. Therefore, for the price, discomfort and lack of results I would not purchase these in the future.

I got the Crest whitestrips fedex'ed to me on Friday and didn't have time to try it until yesterday night. I put it on at 9:30pm and hoped for a miracle. I don't smoke or drink so my teeth don't look yellow but I can't say they are at their pearliest whites. The strip is great because once you put it on, they don't budge. I was able to drink water through a straw if I got thirsty. The instructions weren't so clear on how to put on the stripes. At 11:30pm I took off the stripes and was thoroughly disappointed I did not see any change. There was sticky peroxide gunk so I decided to brush my teeth and surely the stickiness was removed. Sure I saw flecks of white spots but not an overall change. I also did some research and found these only give a "noticable" change rather than dramatic. If would not pay the $54.99 retail price, and neither with their $15 coupon on their site either. I'm glad I gave these a try before purchasing it myself. I am tempted to buy their vivid stripes but we'll see. Overall I was disappointed in this product.
plus the strips aren't long enough to cover at least half your bottom teeth, nor can they fold over all the way to the top teeth front to back.