Product review (5 stars): No need to get brand name, get this!!!
I bought this for my Whirlpool fridgethat I have had for about 6 months, and the order filter light came on. The EveryDrop Filter 4 was around $49 everywhere I looked, while I bought this one for $16!
I could have saved more money buying the multipack, but wanted to make sure this was quality first. I cant speak to the longevity of this yet, but the taste of my water (after running about 10 cups first to wash out the filter) is fantastic!

-Taste very neutral, you know..like clean water.
-Costs a third of the name brand
-Perfect alternative for the Filter 4

I didn't buy the Waterdrop plus filter for a couple more bucks, only because I didn't see that product on their official website which made me not trust it.
This however is a British company, and yes its made in China which some folks don't like, but it takes great, costs a fraction, and was a snap to install. Recommended!