I have had one for a year. It makes about a gallon every 55 minutes. I have well water and not alot of pressure. That makes a difference on how much you get. The filters haven't needed to be changed yet, probably because we have a whole house water softener. I got it when I had only one tank to deal with. Now, I have three to supply water for and I'm constantly making water for them. I think you can get a auto shutoff for it. Airwaterice was the supplier. Their service is very good.