Maybe it's because I've been drinking coffee frequently lately, but at some point, I started noticing the color of my teeth... So, after some consideration, I decided to try the one-day whitening treatment at ID. My biggest worry was that it might be sensitive, but once I actually got it done, I barely felt any sensitivity, and overall, I didn't experience any discomfort. That was actually a bit of an unexpected part. After it was over, my teeth looked more even than before, so I could really feel the difference right away. Since the results after just one session aren't bad, I think it would be a good idea to get regular treatments in the future.