Product review (5 stars): So far so good.
This is definitely an aftermarket ice maker, but I was unable to find an original Samsung unit. It doesn't come with instructions, but the installation is pretty straightforward and should only take about 10-15 minutes if you're handy. It's only been installed for about 24 hours, but so far so good. It feels a little flimsy, but it produced several dozen ice cubes over night and seems to be working just fine. One thing that isn't mentioned anywhere: after installing, be sure to press and hold the rest button on the bottom front of the unit until it begins to cycle. This seems to be a necessary step that could be easily overlooked.