Product review (2 stars): Stick with the more expensive filters!
I received these inexpensive filters within the proposed delivery timeline.  However, once I installed one and purged out the air from the system and went to get a glass of water there was an unusual amount of white sediment swirling around in the glass.  I ran the filter for a few more gallons and it cleared up, but still there's some in the cup.  I'm not sure what's kind of media is inside of these filters but it's absolutely coming out into my drinking water.  Luckily I only bought 3 of these and next time I'll spring for the real deal.