Product review (5 stars): Worth the money
I decided to go with the Whirlpool brand filter after reading some negative reviews about aftermarket filters.  I'm glad I did because this filter performs perfectly, has great flow, and doesn't have any weird tastes.  It is a little more expensive than an aftermarket filter, but it's still a good $20 cheaper than buying it at either of the 2 big box chain stores.  Very easy to install, just unscrew the old one and screw in the new one.