I bought it because I'm not good a flossing. My dentist recommended I get one. I started on low and working my way up to medium. Any harder hurts my gums.
My dentist recommended that I use a Water Pic since I am currently wearing Invisalign and even a good brushing may not work to get to gums as my teeth are moving and changing every month. This model of Water pic works perfectly to hit all those hidden areas and my teeth feel super clean after every use.