Just got a 2015 QX60
My wife traded in her '14 Murano for a 2015 QX60 AWD. It's got the tech package with nav.
The Murano has the same engine/transmission but it's sport-tuned for the Infiniti (although I'm sure most people posting here already know that). the QX60 is larger and drives nicer. The electronics on the inside are very similar between the two vehicles, which helps with the learning curve. My car is a 2014 Q50 Premium AWD, so I'm familiar with Infiniti in general as well.
We took it for a short road trip yesterday- about 2 hrs each way, mostly highway, and so far we love it.