I really like this waterpik a lot. I like to run diluted mouthwash through it, feels great. Definitely start at the lowest setting and work your way up, this thing packs a punch! It comes with lots of neat accessories too. If there was anything I didn't like about this machine, it'd have to be the noise. It was considerably louder than I had expected. I frequently hold the coiled hose while using it, so as not to rattle against the body of the machine. Uses about half a tank per session, so keep a cup handy or something to refill it.