Had my whitening done today and I see significant results. I have naturally white teeth and didn't expect them to get much whiter. But yes they did! And how they did! They look white as snow. I didn't feel any discomfort at all, no pain, no burning of lips or anything. I think the lady who did my zoom whitening did a good job isolating everything around my teeth. I have had many cosmetic procedures done and this is the first one ever where I walked out of somewhere and thought to myself :"Wow, this really worked." We will see how long the results will last, I guess it is essential to follow the after-care instructions for 48 hours. No colored food, no colored drinks, no smoking and so on. I am definitely "pro Zoom".