I am in my 60s and always dislike my crooked teeth, but I went to a cosmetic dentist and he suggested Invisalign. My insurance paid $2000 of it. The process takes a lot of disapline. It is you life for months. I do use pain killer drugs every new set the first 2 days of each set, otherwise I cannot sleep. The trays kind of flair out and scraped the mucous membrane in my mouth. Finally I complained a lot and the dental assistant grinds them down, which helps a lot. My top teeth are looking very good. I needed 15 trays for the top and 20 for the bottom. I use tooth whitener to keep my teeth nice and white. I would recommend this to a friend, but it is not easy. I still lisp after 6 months, but I don't care. Only m y husband says he cannot understand me as well. Updated on 3 Dec 2017: I am very happy with my results 3 years later. My upper are perfect, I did have my teeth all capped so they are all the same color, do not need whiteners and no tray need since I had 10 teeth done at the same time. My lowers I left as natural teeth, they crowd in more. I do whiten those teeth, but they lighten up nicely. I am very happy with my teeth as an older lady. I continually get compliments.