Product review (3 stars): Easy...until needing to run to Home Depot for a final part that was necessary, and not included in the kit.
I read through all of the reviews, and decided this would be an easy replacement.  I have the Kenmore side by side refrigerator, and the water dispenser was leaking, causing water streaks down the front of the black refrigerator.  I watched a youtube step by step video as I installed the new water valve, especially since it looks different then the old one (most of the time this will happen, since they have updated the water valves).  All of that was fairly straight forward.  Where I ran into a snag was when I was attaching the LAST hose.  It was too big for the final valve!!  I saw that this product came with a union, and this is where things became frustrating.  In the directions, and watching the video, there is no mention of this union that came with the product, or why a union would be used.  There was also no troubleshooting I could find online with the problem I had, especially since I don't know all of the technical terms for the various parts of the fridge.  The union that the kit came with is 1/4" to 1/4" (again, not mentioned at all in the directions..not sure what this would be used for).  However, I had a 5/16" that needed to be connected to this final part!  I went to Home Depot, and found unions specifically for refrigerators, specifically for the size I needed (coupling a 5/16" hose to a 1/4".  Got home, coupled the hose from the fridge to the couple, to the hose that this product came with (cut off a small part) and put it in the valve.  I wish that somewhere there was an indication that I may need a different size coupling.  I have never done any work on a refrigerator before, so I really had no idea what I was doing.
I would give this product 5 stars, but I want to be sure people see my review in case they run into a similar problem, and hopefully this can help someone else save a lot of confusion.