I have used strips on and off, also had my teeth whitened at my dentist years ago. I was pretty shocked that I was able to see such a difference after just one application! My only regret is that I didn't shop here first, I paid $36.00 at the salon~oh well...it was worth it! Be sure you tell the tanning salon to allow you a couple extra minutes to apply the product and your tanning lotion! And use a mirror to make sure you are putting the product on correctly. AAA+++ Will buy again!