Depending on how thick your hair is that is going to dictate how long the process will take.My treatment costs $375 and only took 2 hours and 30 minutes. If your hair is really thick then it will coast more because you have to pay for the stylists time. The process is so much easier then I expected and I can't wait to see what the results will be. My best friend just got the treatment a week ago and when she wash her hair it looked amazing!! My hair stylist that did the treatment for me had just gotten it done as well and her hair looked shiny and great! You should read up about it online do a google search and so much will come up about what its made of and such. Am so excited to see the results but I know its going to look great.