I just began my Invisalign treatment. I am on the third day of tray 1. I had my upper wisdom teeth and one bottom front tooth extracted on July 28. I received my first tray the next day. My orthodontist inserted a fake tooth in my bottom tray so my tooth extraction would not be noticeable. The upper tray is a breeze (easy to remove and no pain). The bottom tray is a challenge. It is difficult to remove and insert this tray and it is very sharp. I am getting better at removing the bottom tray, but I don't enjoy it. In all fairness, my upper teeth are fairly straight, the problem is with my bottom teeth so I guess that explains my difficulties. I have wanted to fix my teeth all my life so I think it will be worth the pain and hassle.