Product review (5 stars): No mineral deposits
I've used one filter of the 3 so far. It fit perfectly into our KitchenAid refrigerator and the flow started out great. Like any filter, the flow slows a bit with lots of usage. We probably have another couple of months with this till we'll need to switch it out. I can tell it is working well because we use filtered water in an electric kettle and a Silvia Espresso Maker, which is especially sensitive to mineral deposits. Both units stay very deposit free although the Silvia gets a regular cleaning anyway as part of it's routine maintenance.