I personally don't care for this unit. The glass carafe has to be washed with soap just about everyday. It gets an algae on it which affects the taste somewhat. The back tank when full doesn't fill the carafe full. You have to empty It and fill it again to complete the filling of the carafe. A lot of maintenance to this machine. I prefer the berkey, much easier to maintain.
Water tastes good. But very hard to clean. Even though washing the reservoir with soap and water every week, alege grows on the plastic mechanisms inside and what monitors water levels and due to these being incased in plastic, cannot clean the algae off them.
Hope version 2 of the filter system will allow me to just add more water instead of removing the filling tank to trigger it to operate. Otherwise a great unit.