I really wanted to love these and see great results from them but in both cases I did not. I have tried several other brands of tooth whitening products as well as trays from the dentist and compared to them, the listerines whitestrips were my least favorite. The application was pretty simple but if you do not get them in you mouth on the first try, they can get stuck to your lips and feel like your are ripping off a piece of tape when you remove it. They do stay on after they are applied and it is a great concept that they disolve and do not have to be removed. I did find myself still having to remove small bits that had not disolved and were stuck in my teeth. I also saw no change in my teeth after using them for almost 2 weeks. The one good thing or maybe it was a bad thing that I found between them and others I have tried was that they did not make my teeth sensitive like other products did.