Works great in my 2014 Hyundai Genesis coupe 3.8 Track. The touch navigation works great with it and I use Pandora all the time plus a lot of phone calls. I also use the steering wheel controls and they change the music in my apps including Pandora.
It auto connects when I turn on my car and it also sounds great. People told me I didn't sound good on my in-car bluetooth and Note 3 but they said with my Note 4 I sound like I'm talking on my phone and its really clear. That could be a software thing also.
The biggest problem I had with any Android based phones in the past was problems with connecting and even worst was auto connecting which are all good.
I'm happy overall
AT&T Samsung Galaxy Note 4