Nope! Not for me!
While YMMV, I found this unpleasant to use and very irritating to my sensitive teeth. I've tried others and had a similar problem but this was almost right out of the gate. The pen is harder to use than a tray or strips because it's hard to get into nooks and crannies but they generally do work. I just couldn't deal with the sensitivity. A hard no for me!
Rating: 3 stars