Product review (3 stars): Perfectly acceptable replacement.
Well they seem like just a different generic version of what I have been using.  The name is different (its just a paper label) but it looks the same as all of the previous ones I bought.  So how does it work?  Had em in for about 24 hours.  Flushed the system per the instructions.  The water tastes ok.  Removed the nasty odor/taste which is pretty common in Columbus water.  Is it removing all of the other stuff?  I dunno...no way to tell...I don't have any testing equipment that would provide the data.  So, just going on taste and odor?  These work fine.  Price is great.  Would buy them again.  So far the water flow is the same as before.  I mention that as some other reviewers had issues with a flow in water reduction.