I'm 35 now and 33 when started Invisalign. I had an overbite before and very pushed in upper front teeth, as well as very crooked lower teeth.
I have been in Invisalign for over 2 years now and I have found that it has really been a very easy process overall. My smile and teeth look beautiful now and when I look back at old pictures I just cringe at the thought of how they used to look. I love my teeth and smile now and it has given me so much more confidence to smile now! Well worth it and very little pain involved!