After just one use, I see a big difference!
These are way more powerful than the white strips I was using before, I noticed a big difference after JUST ONE USE!  I can't believe it, I'm amazed.  I also don't have any sensitivity, despite having sensitive teeth, so the pain preventative gel they provided definitely works, but I also always brush with GelKam flouride after I whiten to reduce sensitivity and keep my teeth strong after whitening.  I like that this comes with a to-go pen, not that I would ever need to bleach my teeth on the go... But it will be nice if I do run out of strips and am waiting for more to ship.  All in all, these are the best white strips I've tried to date, and the flavor is excellent to, like a slightly minty coconutty flavor.  I will be ordering again.
Rating: 5 stars