I have had one in my Red Sea Max 130 for about 4 weeks now, the controller isnt exactly intuitive but I have to say that it is amazing pump, perfect standing wave in my tank and all my fish and corals seem very happy. I have mine on wave 3 mode and switch it to else mode every few days for 30 mins to kick up any detrius that may be hiding in the nooks and crannies, even though the flow is good throughout the tank.
My only real complaint is the fact that the light sensor is mounted on the controller itself so if you have it in a cabinet, it doesnt work. I plan on attaching the light sensing diode to a wire so I can attach it to the side of the tank where it will sense light from the tank as opposed to ambient light. You cannot expose the diode in proximity to your aquarium lights or it will burn out.
I have a 220 Gal build in the works and even though I had bought a Tunze wave box for it, Im going to use 2 of the WP40's instead.