Twelve years ago, I bought one of these to replace another brand. The previous pump had not lasted long in a pond environment, and this model was recommended to me because of its efficiency and quality.The water in my pond was not always the cleanest and sometimes the pump had to tolerate the extra stress from a filter that was clogged with algae. After 12 years of fairly constant use, 24 hours a day, I needed to replace it.I am now on my second one, which I expect to last a long time. The build seems slightly improved, and the power cord is now more robust. The box came with a number of accessories that were not included in the past. That makes it more convenient to hook it up under a variety of conditions.If this pump can withstand being fully submersed in a murky pond for over a decade, it's enough to satisfy me. But with the energy it saved me, I would have been ahead had I replaced it several times.