Mine is a 2013 FFE purchased new January 2013 with 5200 miles so far and no major issues. Overall, the car has been a dream.
That said, I've had about four "yellow wrench" (YW) occurrences, but they always go away (and I don't see another for weeks) by turning the car off/on. And, whenever I've performed a Vehicle Health Check (immediately after), nothing wrong is ever reported. Looking back, I'm pretty sure all of my YWs have happened when driving at freeway speeds and adjusting the cruise control (up/down one notch, for example). Basically, just as I press the steering wheel control, the YW appears. So, for now, I am going to chalk them up to (best situation) a software bug or (worst situation) some kind of "real" issue that happens only randomly and rarely.
Edit: I have no idea why I abbreviated yellow wrench as YT before.