I can only review this by comparing it to my countertop model. It is great if like me you have no counter space in your bathroom! But, it takes longer to floss due to the smaller reservoir that needs to be refilled multiple times, and the fact that you can’t just bend over the sink and let the water runout of your mouth. Trying to use it like that makes a huge mess because you can’t really use WP-580 in a horizontal position. Finally, I miss the higher and more variable pressure settings on my countertop model.