The engine issues are believed to be a fuel dilution issue with using 5w20 in the 2.4. For this reason I switched to a 5w30 this last oil change. I'm sure there are some other failures, but every company has some sort of failure rate. Heck my buddies 2.0 2014 ford Focus is having consumption issues at 60k miles. Ford themselves are starting to go back to 5w30.
But in nearly 50k miles, this car has been a pleasure to own. No complaints, Hyundai's customer service so far has been great.