So, I know it depends on every individual on how products work for them. I have sensitive teeth and weak gums. I started using these flossers and my gums got inflamed. I was not sure why it happened, so I stopped flossing. Each time I restarted, my gum became inflamed again. I am not saying it is a bad product but they probably work well for people with stronger teeth and gums. But if you sensitive gums, this flosser will most likely irritate them. I was disappointed because I was really excited to try them.