He told me that my son's case takes about 3 years to finish only to get customers. At the time, I was thinking on going with someone else but didn't. I regret it now. He took about 4 years to do the job. My friend went with the other doctor and everything was done as promised in 3 years. I was thinking that I pay more and get better results but no! just the opposite. more money, bad customer service, and took much longer than promised. My son was so sick of it after 4 years!