With Dr. Reeves and his staffs guidance, I recently completed the whitening process with the KR Whitening Trays. This by far is the best whitening treatment I have used. It was incredibly easy to use and not only was there a video to explain the process and help you start the process, but Dr, Reeves and his staff were incredibly easy to work with and were available for any questions throughout the entire process. It was an adjustment to to wear something in my mouth while sleeping for the first night, but the 17 day process I completed was very easy as the trays made the whitening even and consistent across all of my teeth, both bottom and top. I saw changes immediately with the color and was excited as I saw improvements each day through the process. If you have sensitive teeth like I learned I do, it is an adjustment as your teeth are very sensitive throughout the process, but once the treatment was completed, the sensitivity went away immediately. I would HIGHLY recommend thi