I really like the unit, it functions very well, everything you need to start using it is in the box. The only 2 things that prevented me giving the unit a 5 star rating, is the hose, and the lid. I personally find the hose a little short and I fear kinking the hose due to some of the angles needed to clean all teeth. I also find the lid isn’t very functional, it has to be removed to fill and empty the rank. An alternative design might be a hinges lid with a covered pour/ filling spout. But over all the unit functions very well, and I am happy with the purchase.
I'm a first time user. Was recommended by my dentist because flossing is very difficult. Very impressed, it works as advertised and exceeded my expectations.