Very effective teeth whitening pens!
First of all, the delivery was very fast. The pen is very easy to use. I have used it for more than two weeks, and I am happy to report that I have started seeing results about a week of use. As it says in the instructions, AVOID contact with your gums. When I first applied it, I forgot to keep my mouth wide open and closed my mouth right after; do not do that! Make sure to keep your mouth wide open for about 45 seconds after applying it, otherwise your mouth will wipe off the gel. I have not had any reaction or side effects from using this pen. I think its price beats the competition. I definitely recommend this pen !
Rating: 5 stars