After 1 year of operation, I continue to be absolutely satisfied with the Wilo Isar BOOST5-E-3 pump. From the minimal or non-existent water pressure at times in the 4th-floor apartment of a provincial building, the pump, remarkably low in operating noise, has solved my long-standing problem by ensuring continuous, stable, normal, and simultaneous water pressure whenever needed in all the faucets of the apartment.