Product review (5 stars): Great alternative - just a bit larger than OEM, but still fits.
I just installed this filter, it fits; although, a little tighter than the name brand it replaced.  It just took an extra second to guide this cartridge in.  For the price difference, it's not a problem.

Since I just put this in, and it fits, it has a 5 star rating.  I don't know how much benefit these filters really have, but I'll update this review if something comes up that is noticeably different.