This model is expensive but the quietness is a great boon. Unfortunately, the system jammed after installation by a professional plumber. It shook so much that the pipes under the sink began to leak leaving water in the cupboard. The plumber returned and inspected the system and said that the machine was malfunctioning. He gave me the number to call in order to contact one of your technicians. he arrived very soon after the call and was able to fix the problem. Since then it has been working as it should.