Product review (5 stars): I'm just sticking with these genuine MWF cartriges from now on.
I tried one of the cheaper filters with the lower nsf rating thinking that it would be fine since we have decent quality tap water. I was wrong. With the cheap off brand, it actually tasted worse than from the tap. Not too sure how they accoplished that...

Anyhow, the mwf filter I got with amazon prime arived today (sunday) and the water tastes great again after running a couple gallons through it. I dumped all the ice out and look forward to good tasting ice as well.

I don't know if you get what you pay for with this genuine mwf filter but you sure don't even get your twenty dollars worth with the cheap knockoffs.