Product review (4 stars): No problems so far
Just like it says, pop it in and away you go. Even though it does not say anything about purging the system and flushing out all of the black carbon, I did anyways. Really not much of anything came out, so I almost have to think that there is no black carbon in the filter. The water taste a bit better, but in our area (LBC, CA.) the water is already good.