I have had 5 or 6 of the Peter Coppola treatments and if they are not done right they won't work. If your hair is not properly shampooed with the clarifying shampoo, it won't work (3 times). If they don't leave the keratin in long enough (30min), apply Keratin to all of the hair, and let it sit under the plastic cap for 30 min to process, it work work. If the iron is not set at the right temp and in 1/8" sections flat ironed 5-7 times after the keratin treatment has been blown dry, it won't work. I have reached the point where I am tired of paying $360 with tip to not have it done properly. I now do it myself and LOVE IT!!!!!!!!!!! I will never pay anyone to do it again!