Good product and effective I own this product for 1 month and I am always satisfied. Easy to use. I use it after each meal and at the moment I have instructed that when I received it. Of course the tank is small but filling is easy. I fill two to three times per use, because I makes much of the back teeth. Having very clenched teeth I often choose the jet. You can turn your head during use because it is adjustable. Obviously the first use I sprayed; we have not done once!