Product review (4 stars): Works Fine, Fits Fine, Tastes Fine
Installed the first WSG-1 filter in our GE Profile about 6 months ago and just replaced it with a second one.  Definitely improves water taste and can't taste the difference between it and the more expensive GE equivalent.  When installing the filter, there were some drips of water just before it fully lined up with the arrow on the filter receiver.  It then sealed fine.  Box states the manufacturer tests the filter against ANSI/NSF Standard 42.  Made in the USA.  I recommend writing the installation date on the label.  A good value for the price so we'll continue to use this brand.