I really like it. You can see the flow go across the top, down the side, across the bottom (about 2/3 of the way) and then back up toward the XF150. I just leave it on continuous flow, but it has a pulse function, as well as a forward and reverse function. However, when in reverse it creates too much noise and is fairly ineffective (it moves like 25% as much water as in forward). I think there are some principles of fluid dynamics at play, laminar flow vs. turbulent flow..