I purchased this distiller for my self about a hear ago and the discussing the merits of distilled water for cooking and drinking decided to order one for my son as well. I have made over 300 gallons in the past year and my son is making a gallon a day to support his needs. Machine works just great and have set it up on a timer to get the lowest electricity cost. Water tastes great and believe that it will work for a long time. If you make 300 gallons a year, that is a $ 300 savings over buying distilled water in the store. Electricity probably costs about $ .25 per gallon.Frieda C