I give the strips five stars, but I'm rating them at two stars because I didn't notice any change in my teeth. With every other whitening strip I've used over the years, I've noticed an improvement (multiple Crest strips and Target's store brand). Not with these, though. However, others here have noted a nice improvement, so perhaps it was just me or a bad package (it had not expired, though). Nothing against Rembrandt, though, as the best whitener I've used was some of their gel.

I think that the application and the adhesion of the strips is superb. These are quite a bit thicker than the Crest strips and will not easily slip off like the Crest strips. These are not unique, though. I had used Target's store brand before these (and since), and these are identical in construction except that Target's strips are blue and these are white. The Target strips are also quite a bit cheaper. So, if you have a Target nearby, I recommend trying their strips first because you get more for less money.

A note for those with sensitive teeth, try using a toothpaste for sensitive teeth for a couple of days before starting the strips and continue to use it while you're using the strips. I use to experience extreme pain when using whitening strips, but I don't now that I use toothpaste for sensitive teeth during whitening. I've used Colgate, Crest, and Sensodyne - they all work the same for me.

I regret buying this product. After using 1 strip, I had to take pain reliever for 2 days.

Ive been using this product for 3 days and have already seen an improvement in my color. One of my bottom teeth was experiencing a little sensitivity but nothing too unbearable (just moments but that didn't last very long). I would recommend this product for anyone who wants whiter teeth, but don't have the time to see a dentist or for the strips that require wear (2) times a day. Very impressed with the Rembrandt brand.

Excellent product. I have tried about 4 different types of white strips/ whitening products, and these are by far the best. They whiten more quickly and stay on MUCH better than the Crest Whitestrips (my second favorite-- they're my fall back). Not only that, but they're cheaper than the Whitestrips also, and they cover more teeth so you get a more uniform whitening.

I could see a difference after two uses. I'm a convert.

Out of all of the whitening products I have tried, this product is the most user friendly. Nearly all of the "strips" on the market have the same levels of peroxide for whitening; the true product differentiatior is the usability of the product. This product conforms to teeth very securely, covers all areas, and does not loose its adhesiveness after 1.5 hours (as long as I have tested).