I got my impressions done in November and they came pretty quickly. They arrived around the middle of december, but my orthodontist is so busy, i didn't get them in Feb 1st. but i am on my last day of tray 7 and can see that my two big problem teeth are more visible then they were before.
I have 21 trays on the top and 19 on the bottom and am really excited to finish, so i can go to college with nice straight teeth. Also, I brush my teeth so much, they are much white than before.