Have been using this distiller for water on an almost daily basis for more than two years. Just one design complaint - The desired temperature setpoint is not remembered. Recommended temp for water requires repeatedly pressing the temperature advance 13 times after powering on. Furthermore, if a power failure occurs during distilling, the default (low) setpoint reverts after power restore so water won't resume distilling without human intervention.Otherwise the unit has proven to be a reliable workhorse. Found that periodic soaking with dilute citric acid solution works great for removing well water mineral scaling. Vinegar works too but not as well.