Product review (2 stars): Water flow is too restrictive
Great price, but water flow is too restrictive.  I have Kenmore Elite (mfr'ed by LG) fridge and the Water Sentinel filters are much more restrictive than the Kenmore/LG branded filters.  At first I thought it was my imagination, so I pulled out a stopwatch to compare.  The Kenmore OE filter takes 40 seconds to fill the 32 oz. with the water flow at my house to my fridge, consistent timing with 3 tries. (The Kenmore/LG filter bypass plug takes 27 seconds to fill 32 oz. for reference, also consistently over 3 tries.) The first Water Sentinel filter took between 56-59 seconds to fill 32 oz., and this was about a month after first installing it.  So I tried the second Water Sentinel filter out of the 3 pack and it took 52-57 seconds to fill 32 oz.  I timed three fills with each of the filters, but basically the Water Sentinel is somewhere between 35-50% more restrictive than the OE filters.

The OE branded filters are outrageously expensive, so I will continue searching out an aftermarket of equivalent quality, but the Water Sentinel isn't it.