I finished Invisalign about 2 years ago.I am on the front lines at the cosmetic dental practice of Dr.I. Koeppel. He gave me the beautiful smile that I wanted with no roadblocks.My speech was barely affected and I am on the phones 12 hours per day.I am convinced that you need to have the best dentist doing it and I did. It is work,but worth it. Updated on 25 Jun 2011: I had about 4 buttons on my anterior teeth during some of the Invisalign treatment. My dentist removed the buttons and my teeth are fine. I neverhad any issues. My dentist, Dr. Koeppel is a cosmetic dentist and he knew exactly how to remove the bonded buttons.At this time, you would never know that they were there. My natural teeth are perfect with no imperfections from the buttons. The key to anything is being in the hands of someone who knows that they are doing.