We purchased the 30 cup dispenser over 2 years ago because we have extremely hard water and we live where there is quite a bit of oil and gas drilling. It has helped tremendously with keeping our coffee maker free of calcium and likely kept us healthier from contaminants.  It sits on our counter and is not conspicuous at all.  the best part is it is portable enough that we travel with it in our RV and it keeps us from having to purchase an expensive filter system.  It is easy for me to detect when the filters need changing because the water just "smells" different.  Great products and filters!