The clinic was fine. The process is uncomfortable but I was made to feel as comfortable as possible. I was incredibly disappointed with the difference before and after. I was told there was a 10 shade difference but this was barely discernable to the naked eye. It was closer to 1 shade. The shade chart they use has incremental differences, and is non-standard. The pictures on the website are nothing like what I experienced. It was an absolute waste of time and money.