I go to Dr. Wolfson for my cleanings twice a year and he's great. I drink a lot of coffee, which I honestly can't give up so I had some stains on my teeth that I didn't particularly love. Dr. Wolfson told me about Zoom Whitening so I thought I'd try it. I have to say I couldn't be happier with how white my smile is. It was a little more expensive than those Crest Whitening Strips, but worth every penny because it actually works!