Will buy again!
I really like how easy to use these pens, it doesn't go all over my gum, i had the jel version before, it was so messy, it gets on my gum even when I am apply carefully . I also used a Led light from my jel version of whitening kit, got really good results with these pens, definitely can see the difference after one use, very happy with this buy.
Rating: 5 stars