As close to perfect as you can get
I am very impressed with your products. I even like that you sell optional 20" filter housings with pressure gauges. I upgraded my 3 filter system to a 4 filter system. I am using one 20 micron sediment filter, two KDF filters, and followed by a carbon block filter. I have water soluble iron in my water. My only constructive feedback is Filterway needs a 20 micron 20 inch filter instead of just 1 micron sediment filters. I had to buy a 20 micron filter from your competitor. Other than that I am highly impressed.