Product review (2 stars): Works as advertised
This ice maker was a direct replacement for mine (Whirlpool PN# 4317943), even used the existing wiring harness. My OEM unit had an "ice maker plus" attachment snapped to the front that is basically a small fan housing that blows air across the ice tray. The white cover pictured pops off and the ice maker plus snapped right into its place. Three small Phillips head screws hold the unit in place in the freezer, the wiring harness is quick-disconnect type that has a plug on the end.

The device made its first ice in about 3 hours, some reviews do state that it takes 24 hours or so for the built in thermostat to work but that wasn't the case with mine. Local parts houses want $120.00 USD for this exact same unit, you can get it on Amazon for $40+/- and install it in 15 minutes. I saved the old unit and extra parts that came with the new unit for future use (parts salvage) if needed.

Update: 08/20/2012
While everything above is accurate the unit has failed in the last few days and is no longer making ice. I'm SOL as its now 9 days outside the 30 day return window as outlined by the seller. I'm going to have to get another unit and try again, still, buying two online is cheaper than one locally. Too bad manufacturers don't make things to last anymore.