I got PFPX yesterday and thought I was gonna make an interesting flight. I created a flightplan in by beloved PMDG 747 and flew EHAM-KJFK. I use ultimate traffic 2 and active sky also. The interesting part was that I prepared it so I compared entire flight with the real flight on flightradar24. Due to traffic I had to wait a really long time at runway. PFPX selected a more nothern route than the real one. Initial height was the same for both but before descend I was at FL400 while he was at FL360. Due to winds or index I flew slightly slower than the real one. Then they landed I was descending at FL180. There is a simple way to check your settings compare to the real thing .

That's pretty cool, never thought of doing it myself.