I purchased Invisalign through Dr Johnson and I was skeptical at first. He charged well over a thousand dollars LESS than the next 5 or 6 estimates I received. Everything worked out perfectly. A friendly staff that remembered me each time I came in and a flexible schedule. I had to leave for Iraq part way through my treatment so they prepared the rest of my aligners and sent them with me. I am heading back next week for whitening. Very professional with a personal feel.