Product review (5 stars): No. Cheaphydrofilteriosis isn't real.  It was supposed to be funny.
As far as I can tell this works as well in my Kenmore fridge as the expensive ones from Sears.

Until the doctors diagnose me with Cheaphydrofilteriosis, I'm going to stick with this economical option in water filters.

Same goes if I'm diagnosed with Cheapcharcoalfilteriosis - because the knock-off charcoal air filters seem to work as well as the Kenmore brand as well.