Product review (5 stars): All problems gone after a few minutes.
Installed the filter and had all the problems other reviewers complained about. It dripped and seemed overpressurized.  I thought I made a mistake buying these.  But the directions (on the insert, this step is missing from the directions on the box) say to flush the filter for 5 minutes.  I flushed mine about that long but in steps.  Knowing the filter material (probably activated charcoal) takes some time to wet, I ran about 1 gallon through a glass at a time (and watched it drip for awhile after each one).  Then I let it sit for about 15 minutes and repeated the process.  Probably dumped 4 or more gallons - which is a bit wasteful, but the dripping and "overpressurization" got better each time. And the water tastes fine.

The only downside is the price, but it's better than the alternatives, especially since I live in an area with good water.  One of these days I'll bypass the filter, but for now I'll use these.

Tip: put a towel under the filter.  My Samsung dumps about 1/4 cup of water when removing the old filter.