I admit I already owned a Waterpik and I admit it sat on my counter because it was a two step process. Brush the teeth with the electric toothbrush then fill up the Waterpik with water and rinse. More often then naught I skipped the Waterpik flossing -- too much trouble. With this new Waterpik I can brush my teeth and with the press of another button floss my teeth. I am actually flossing everyday, my dentist will be thrilled. This unit takes up much less space on my counter and is very easy to use. When I am done brushing/flossing my teeth are smooth and clean. I highly recommend you buy this new brush.