I purchased these with a high expectation, because of so many beauty gurus were raving about them. Beautiful pearly whites, and that's what I got! I was really scared about my teeth getting sensitive because I do have quite sensitive teeth but surprisingly no pain! After the first three days (I used a strip every day) I had an uncomfortable feeling (wasn't painful) still used them daily and the feeling went away as soon as I stopped. It didn't worsen. And I can honestly say even after the first strip I noticed a slight difference. Once I finished them, wow! My teeth are so white and completely stain free, I am amazed.
The strips are easy to apply, and if you have your mouth open with your teeth exposed (to dry them) for a minute or so, they won't slip at all. You may have a gel type residue after you remove them, but don't brush your teeth. An hour before or a hour after as the toothpaste creates a barrier. Overall, great product, certainly whiten and brightens teeth, totally recommend.
I try to be careful with my oral hygiene, but my teeth can sometimes look a little yellow. I was looking for something that would be easy and simple to use, not cost too much and not cause problems for my teeth by making them too sensitive.
I liked that these were easy to use and saw results quite fast. I found that they worked reasonably well for a short period of time but their effects soon wore off. I noticed my teeth were also feeling a lot more sensitive than normal.
I do worry about them causing harm to my enamel as I would rather have teeth are healthy and slightly dull looking than bright white with the enamel ruined.
Overall i would probably purchase again if I had an event and wanted to whiten my teeth for it, but I will still keep searching for that elusive perfect teeth whitening product.