Product review (1 stars): Minor problems, but manufacturer support poor
Been using system for a couple of years, and have had problems with two filters. First one had an odd colored filter membrane and the water dripped very slow, and more recently, another filter kept letting bits of charcoal flow through.

Whirlpool customer service was not helpful. Insisted we return the filter to point of sale - Amazon (who responded very nicely). Phone rep did not seem to understand this was not a refrigerator filter cartridge..