First let me say they are no invisible, and god they hurt to take out the first couple of days, i feel like im going to be on a model diet here, because i dont want to take them out beacasue they hurt and take me forever to take out! They also put these little clear cement things on my teeth that stick out, to hold the invisalign in place. They didnt tell me about that until i paid and went in for my appointment. They kind of make me talk funny also. I hope they work!