Mine arrived this afternoon - very nicely made, glad I didn't attempt to solder that together myself!
Still waiting on most of the other bits (ADS-B dongle, recommended WiFi dongle, case, micro SD card from the recommended suppliers, plus the GPS module on the slow boat from China) but wanted to give it a try so borrowed a WiFi dongle & SD card from a previous Pi project, plugged everything together, downloaded the installation image and gave it a go.
Installed PilotAwareAndroid on my Nexus 7 (2012) running KitKat 4.4.1, minor issues setting up Skydemon (needed to turn on data when flying, keyboard hides the Air Connect Key box making it difficult to be sure its accepted the 6000 imputed), ran through the first time boot sequence with the Pi... got a licence key nice and quick from Lee...
And it all works as it should! The Nexus tablet connects as it should, not seeing any traffic until my ADS-B dongle arrives but the unit is transmitting a nice strong 'blip' on my scanner every 2 seconds on 869.4, which reaches to at least the top of the garden
Very pleased so far, especially since its been a simple plug together operation, looking forward to getting it finished and taking it flying.