Product review (2 stars): BEWARE!!!!!  May have broken my fridge water dispenser!  SEE UPDATE
<div id="video-block-R2NHC6G40YQAQY" class="a-section a-spacing-small a-spacing-top-mini video-block"></div><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/D1ICvLC1r0S.mp4" class="video-url"><input type="hidden" name="" value="https://images-na.ssl-images-amazon.com/images/I/91wGNJqU4lS.png" class="video-slate-img-url">&nbsp;&nbsp;BEWARE!  Replaced my PUR filter with one of these, and halfway through flushing the white crap dust, the water flow stopped altogether.  I removed the filter and water still does not flow!

Whirlpool support takes no responsibility - not for the potentially defective filter nor for the possible damage caused to my fridge water dispenser. The fact that the water stopped flowing midway through flushing the white dust out was just a major coincidence.  All they can offer me is a service call which I would be responsible to pay for.
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Update: I replaced my water inlet valve and water began flowing again!  However, several gallons into it, there's still white dust floating around in the water!  Easiest to check in a see through Pyrex by some light.  I'm not sure if this will ever go away...

Lessons learned:

*Take it easy when flushing the dust out of the filter.  Do a gallon, give it a break, then repeat as necessary.  I believe the constant use in trying to flush out the dust is what broke the valve.  Luckily, with YouTube and some common sense it was an easy repair.

*Whirlpool, the fridge and filter manufacturer, does not care and don't expect any support.