Best one I’ve used!
I’ve used other so called “whitening pens” that do very little to whiten your teeth and almost gave up.  Then I tried this one and saw immediate result and continue to each time I use it.  It takes 30 min, which is no problem, and you’re teeth are noticeably whiter.  I use it about once a week and continue to see improvement.  Best I’ve tried!
Rating: 5 stars