Started Invisalign at 41...about time. My twin sister and I got braces about the same time - she got the metal braces instead. We have some of the same mouth/teeth problems so it will be interesting to see each of our results. I am on tray 3 of 40 and just got 15 "buttons" added today. Hope my teeth will feel clean again because all I can feel is the buttons and not smooth teeth. Probably because I have so many of buttons due to crowded teeth. Lol. Process has been good so far. 74 more weeks to go not that I am counting. And you CAN see the buttons on front teeth - just gotta get used to it. The process of putting the buttons on was an adventure but seriously not bad. Can't wait until I see big time results.