I flew 5 hours this morning to get home before the heat (I didn't beat it then!) with my first real tryout of OzRunways on a secondhand iPad 1 3G version, and with the 3G function turned off. The inbuilt GPS never missed a beat, and the flight planning made it SO easy to set up the 3 legs of the flight. Just having the flight following (with HSI if you choose that option) overlaid onto a VNC provides real-time monitoring of control boundaries, frequencies, PRD areas, etc. For the record, the battery monitor showed 34% remaining at the end. Way to go!