This is the first time I've ever owned a Waterpik and I am so surprised by the power!! I have mine set on 2-3 and can't even imagine putting it up to 9 or more!!! Good thing you remind people to start at a low number AND keep the stem piece in one's mouth. I certainly would have sprayed the entire bathroom with it!! Ha, ha. GREAT PRODUCT!!
I finally bought a water pic, as suggested by my dental hygienist! After brushing and then using my pic the amount of trash that falls out of my mouth is scary. I look forward to using it and watching my gums improve! Sold on your product!