I am a 40 year old with overcrowding on my top two teeth, they overlap. And severe overcrowding on the bottom. I just got my first set of aligners. I was worried after reading reviews here that they would cut my gums and hurt. They actually don't hurt at all. The first day they were hard to get out of my mouth, but they've loosened up and now it's much easier. I'm really excited about them and actually like the way they feel in my mouth. I think it's because I finally feel like i'm doing something about this, and it makes me feel good.