I have been using this water distiller for 3 weeks now, making multiple gallons of distilled water a day and can say this distiller is great. The timing is nearly spot on at about 3 hours per gallon. The key, with all water distillers, to keeping this clean is timing. If you can stop the machine before you’ve completely distilled the entire tank, the cleaning is much easier as the scale doesn’t burn to the bottom. A couple of drops of white distilled vinegar and some water clean the tank right up. No scale, no smell, no issues. I change the internal filter in the nozzle every week to ensure good quality. Is this going to get you medical grade distilled water? No, absolutely not and that’s not what it’s advertised as. Will you get high quality distilled water for humidifiers, drinking, and other things like tabletop ice makers, etc? Absolutely. Highly recommended.