First and most important the filter housing corrected the water flow issue.
Now the fun parts. Removing the hold housing is just removing two screws and disconnecting two water lines. Screws were easy. The supply water line was a total pain. Depressing the line connector is much more difficult that expected. The output line was a breeze.
Reconnection of water lines to new unit was very easy. Mounting new unit not so easy. There are two tabs that connect the housing to the refrigerator is mechanically difficult. The plastic trim cover is still another pain.
Whirlpool design was not for home owner service. Best advice is watch videos first and during of how to install.