Picked up my new NX300h F sport last month and really love it! However, a few things I really do not like at the moment;
1. ML sound system.
The sound system is for me a real disappointment. It just sounds flat, with no bass at all at low volumes. If you crank it up it sounds better but much too loud. Already played around with lows/mids/highs and fader. I can imagine it sounds great for classical music, but that's not my cup of tea...
2. Navigation screen flicker.
It looks like the refresh rate of the center navigation screen is off. I can really see a screen flicker that is starting to annoy me. When the car is in night mode, and the colors turn to night blue, it seems to disappear.
3. Transition electric to petrol
My previous car was a CT200h and felt that the transition from full electric to petrol was much smoother. Probably this will be better when the car has some more miles on the clock.
I am getting around 33mpg at the moment on regular fuel (50% highway - 50% city), which I honestly think is not that bad for such a heavy car.