Product review (4 stars): So Far, so good.
Been using these filters for a couple of months.  Aside from a brief spray of water when I installed them, I've had no issues.  Flow speed has been good and the water was clear after I ran a couple gallons through.  I have a feeling the "low flow" reviews either got a faulty filter or were installed improperly.  You have to allow the filter to fill with water before you install it to keep the flow consistent.