I wanted to try this product to filter out contaiments in my water. This is a one click put on and take off dispenser. It took less than 5 mins. to install. The instructions were easy to follow. It comes with a filter included to start using immediately. It has different color lights that tell you if the filter needs changing. It's simple to use, pull the lever down and wait for the green light to show it's running filtered water. Never run hot water thru the system.