Product review (5 stars): Buy it, it works.
It works.  The first cycle after installing, the tray didn't fill.  I'm pretty sure this is because the icemaker tells the valve to be open for a set period of time, and the first time through, the tube from the valve to the icemaker was empty, and the 'valve open' time period was too short to fill the tube and also fill the tray with water. From then on, it's worked perfectly.