Product review (3 stars): Works fine (now).
Filter installed and rotated into place as with previous filters.  Two days later I noticed puddle of water dripping from shelf.  Put a cup under filter drain hold and proved it was leaking.  O-rings looked fine.  Removed filter and reinstalled upside down from original position.  No further leaks (left the cup under drain for a week).  I think the filter is okay and I would buy again, although I'll be cautious after install.