Product review (3 stars): Not as good as OEM & too big
If you have ADD/ADHD like me, and/or just don't want to read the review, here is a synopsis:
It works and produces a taste better than my tap water BUT it is FAR inferior to the OEM filters so if you have the money buy the OEM filters.

On with the details!

I had been using OEM (same as the one factory installed) replacement filters for my fridge for the 5 years that I have had it.  I decided to check out 3rd party replacements as a money saving measure.

On with the problems:

*Installation
It cannot be installed into my refrigerator with the top shelf in the top position, which is where mine is.  Once the shelf is removed the installation wasn't the best.

There are no marks on the product to indicate where to line up the filter or when it is in the locked position.  So you can't judge how far to turn it to lock it in place.  My refrigerator filter mount seemed to "move" a bit when installing the second filter.  In other words, these filters are a bit too snug.

* Look/taste
Then the water that came out during the initial flush was less than desirable.  It was milky and looked like it had sand in it.  No, there wasn't sand, but if you think about a glass of watered down skim milk with sand mixed in...that's what I saw.  Once the flush was done it did return to an overly aerated bubbly look.  The bubbles did go away if the water sat for a minute or two.

The first glass of water wasn't the best tasting so I flushed it a little more.  That helped with the bubbly look.  The taste of subsequent glasses was just OK.  Not nearly as good as the OEM.  I drink a lot of tea and can confirm the quality/taste of my tea made with this water just isn't as good as the OEM filter.  In fact, my brita pitcher at work produces a better cup of tea**.

* Specifications
So, being the nerd I am, I decided the taste difference warranted a look at the specs of the filter.  It turns out this filter is not "just as good" as the OEM.  Check out the stats on what particles make it through the filter and the percentages.  It's not night and day, but getting a filter from 99.9 to 99.99 costs money!  That's why this filter is cheaper, it just doesn't filter as well.

So, based on that I will never buy anything but OEM filters after this.

HOWEVER: For those on a budget using this filter is much better than simply not using the fridge to filter water.  That's the main reason I gave it 3 stars.  It works and it's better than my tap water.

**That got me thinking.  I'm going to bring home my brita and use it on my water and do a side by side comparison of water and tea.

Update 1/17/2013 - I just installed the second filter in this 3-pack with more of the same results from the first time through.  One thing I didn't remember is that the water coming out of the filter is still "extra" aerated even a full week after daily use.  Between the fiancee and I we easily draw 2L a day through the filter, so it's not like this is the second cup of water.  I haven't done the brita test yet, but the filter is now at home so a side by side teat test will happen this weekend.

Update 2/19/2013 - I actually did try the Brita filter test the weekend after I updated this review.  There was a HUGE difference in the clarity of the tea.  I have not gone back to using this water for tea since that time.  The bottom line: you get what you pay for.  If you can afford the OEM filters then buy them.