Had no problem starting the car under normal conditions.
The problem, which happened once, was that the car refused to restart after it shut itself off under start-stop conditions.
In detail:
I was in a very long queue for about half an hour (start - stop every couple of min). Then, once, when I lifted the foot off the brake the car did not restart. It showed an error on the cluster telling me to restart manually. I followed the procedure displayed but the car would not start and instead was making this weird long beep.
So I thought to make a "hard reset". Got out of the car, locked it, waited 2 min for the power to totally go off, then opened the car got in and it started normally.
I told this story to a tech at the6
dealer and he said I should stop using ISG (Idle Stop and Go) immediately and that they've had this problem diagnosed with another kia and it was the starter motor. They changed mine as well and I've not experienced that again.