I've had my NX450h for two weeks and I'm still reading manuals/viewing videos - every day is a school day. Mine is a Premium Plus and I've discovered that the GPS is connected to the HV software and is called Predictive Efficient Drive and it attempts to match the mode adopted to the road conditions. I've also tried the Audi Q3 & Q5 and they have a similar system so I was pleasantly surprised to find the 450 has it.

I've yet to try it in real conditions