Easy to use and easy to order (reminders are great). Works with our older refrigerator which still looks like new after 30+ years. We are a two person household & have had no issues with this. Love being able to have the filtered water on hand. Saves money rather than buying bottled water and having to lug it inside the house. Once in awhile I have trouble getting the old one off but at 74 it is due to lack of strength in my hands. The taste is great!!