I've had this since Dec 2020. I live in central Texas where the water is hard. I had high hopes for this machine but it has performed poorly. I changed my cartridges regularly. It is not reducing any of the hard deposits in my water. I have had 3 different vendors out to check the water this week and my hardness rating is at 22. My shower door is covered in calcium as are my fixtures. I am replacing all my fixtures this weekend. I am getting a salt based system with a reverse osmosis under my kitchen sink. I have a Manor Duo unit that is supposed to remove smells and make the water taste better. The last few months I have had a horrible sulfer like smell coming through. I can't take it any longer. NuVo hasn't been able to help me. And, my house is only 4 years old.