Product review (4 stars): Good product; hard to install
The product fit well and functions well.  However, the insertion/removal tab at the bottom is smooth and, for me, was impossible to remove from the filter slot without using a tool.  Poor design.  With a simple roughened surface or edge on the removal tab, the removal of the old filter would have been simple.  The designer needs to remember that the old filter seats with an "O" ring and requires effort to unseat.