I had a Gyre XF150 that suddenly died on me. Also had a mp10 that the wetside failed on me a second time. So i dumped them both and bought two Tunze 6055s and the 7097 controller. I have a couple of the AC Tunze powerheads that are several years old and working well despite the abuse I cause to them, so I figured I'd try out the DC powerheads. About 8 months in and they are working as well as the day I bought them. Also don't require me to clean them as often as the gyre or mp10.