I love mine, just upgraded lasted month. I was using an RW-4 previously which died unexpectedly after only 6 months. The RW-4 had a very narrow flow which led to a hotspot. Sand at the end of that hotspot was blown around but the farther away you got from that beam, the less flow there was. Any time a fish would swim past the powerhead, they would practically get thrown into the rockwork. The MP10QD has a very wide, tankwide flow pattern. Fish don't get shot against the rocks when they pass in front of it anymore and even on its highest setting in a BioCube 29, my Fiji Pink doesn't get blown around. Even when running at 50 - 60%, the pump kicks up detritus and uneaten food off the substrate and keeps it suspended so that it can be eaten or filtered out. Everything about this pump is durable and high quality, down to the wiring itself. I wasn't very happy about the price tag when I first bought it, I will admit, but it has definitely impressed me.