The biggest consistent problem mine has is the display panel burns out LEDs in a matter of weeks. Yes, burning out LEDs. If I put in a new panel (which thankfully is fairly easy, just a ribbon cable and a couple screws) it works for a few weeks, then the LEDs start to burn out again. So it becomes a guessing game of whether you're going to get water, crushed ice, or cubed ice.

There is basically no warranty on replacement parts. We stopped replacing that panel, and now we just play the guessing game. Fortunately the fridge does remain functional as a cold box, at least. There are a few other problems, like accumulating ice in the tray at the bottom, but this is not really a Samsung-specific problem, lots of fridges develop this issue.