We decided to have our OneStop Plus system installed 6 months ago as we have very hard water; 16 degrees German hardness where the scale only goes up to 20! In those 6 months we have not had to clean the water reservoir of our coffee machine once and neither did we have to clean the faucets and shower cabin, whereas before this was a weekly job. Our dish washer is also using a lot less salt and our washing machine is working smoother with clothes coming out softer than before. My experience with Onestop Plus has been very positive and I would recommend it to others who have issues with hard water!