I purchased this filter when I was diagnosed with an auto-immune disease. Being on an immunosuppressant medication, this filter has not only made the water taste great, but has helped my immune system cope with the medications. I haven't been sick nearly as much since drinking this water every day; and the quality of the faucet is impressive. I've had other filters in the past and they get mildew buildup inside the faucet. I've taken this one apart, and it was as clean as could be. The only maintenance I do other than the annual filter change is to use a straw brush to clean the edge of the faucet once a month.