Product review (4 stars): Working well with our Whirlpool fridge...though a little tough to get on
This was the best deal I was able to find on water filters for our Whirlpool Gold refrigerator (I purchased 2).  This replaced the (original) Pur UKF-8001 filter that came with the fridge.  I had a bit of difficulty installing it, as the opening includes a gasket not found on the Pur filter.  The info with the filter claimed this helps ensure a tight seal.

On my first attempt installing it, I ended up getting water squirted inside the fridge (I believe your normally supposed to be able to leave the water on).  I tried with and without the gasket...in my case, the gasket was needed. So, I ended up turning off the water and on my second attempt was able to get it installed.  I'm not sure if relieving the water pressure made a difference, but it seemed to go on a bit easier.

As for water quality, yep, it's doing the job.  I can't tell any difference as compared to the Pur filter that come with the fridge.