Bests & Worsts Reviews from Amazon

My husband had bought this originally and after just 2 days of him using it once a night I could see a significant change in whiteness of his teeth (and he didn't have yellow teeth to begin with), I knew I needed to try this. Now, I am generally pretty wary of teeth whiteing products because I have had a problem with sensitivity in the past but I have been using this every night (with the exception of one night) since recieving it about a week ago. I have smoked for over 5 years and as a result my teeth have yellowed. I am in the process of quitting and as motivation I wanted to whiten my teeth. My teeth in less than a weeks time have changed in at least 3 shades and I have gotten compliments on my teeth since just the 3rd day. And the best part: no sensitivity! I highly recommend this product to anyone wanting to whiten their teeth at home effectively, even if you have sensitivity problems. Oh, and it doesn't hurt that you can get a free refill if you send a picture of the code to the company within a week of receiving your kit!