You never need to floss once you use this everyday after brushing your teeth. Whatever stuck in between your teeth that your toothbrush can't get to, the water pick does a great job at pushing it out leaving your teeth squicky clean. If you have bleeding gums, after using it for 7 days straight, your gums stop bleeding.
My dentist encouraged me to purchase this and I've been using this for about a month now. I have some deep pockets and the dental floss wouldn't touch it. I'm confident that I'll see improvement at my next appointment.
This was a gift from daughter because I was having a dental issue. Water pic did a great job of removing particles from a pocket that developed keeping clean until healing finally took.