My mouth never felt so clean, and I am sure my gum and teeth are benefitting. Toothbrushes are not enough. Toothpicks are ridiculous. But, be ready for a MESS of water dribbling out of your mouth. make sure to use warm water or sensitive teeth will let you know who they are! Taking the water container on and off can be 'sticky'. The hose connecting to the wand feels a little cheap and I am sure will need to be replaced in a year.
I'm not sold on the unit so far. the MAJOR downside is the length of the hose. It's not a good thing when you pull the unit off the place it is resting .At less then 34 inches and with as tight a spiral that you manufactured into the hose, it is a pain to use! If I'd known the problem, I would not have spent the HIGH cost to purchase. The model is a WP-112W. It also needs suction cups on the base, to keep it from being pulled.