Don’t care for dark blue reservoir; can’t see fill mark. And there’s a lid on reservoir I have to prop open with a household flange to air out, otherwise bacteria will collect.
The directions say to use over the sink and keep your mouth open as you use it but you have to keep the unit vertical all at the same time. This is awkward at best if you don't want to spray water all over the bathroom. It works well in cleaning between my teeth but would be better if you didn't have to keep it vertical at the same time.