Not exactly 'in flight' but I took a run down to East Fortune yesterday with my new PAW ADS-B running in the car. Mini mag mount on the roof and the unit attached in front of my rear view mirror (windscreen side) so the GPS had a good view of the sky. I saw lots of CAT traffic out of EGPH on SkyDemon on the way down. In the end, I didn't manage to get my plane out, but the CFI took a student up for a 1 hour lesson late on (ADS-B out equipped) and I was able to follow them all the way on SkyDemon except for a brief period when they disappeared to the south west behind the hangars.
There was also a fair bit of commercial traffic well to the north and out over the sea and I was able to demonstrate PAW to quite a few club members in the comfort of a warm car!
Hopefully will get it in the plane soon.
Peter
p.s. Meant to say, I was really impressed with the positional accuracy of the unit. With SkyDemon zoomed in to the airfield plate PAW accurately showed my position outside the hangar and I could clearly see that the 'target' aircraft was tracking along the taxiway - as opposed to the adjacent runway. On their return, their aircraft changed to red as it crossed in front of me (while landing) and again as it taxied in towards me at the hangar. All in all a very worthwhile proving session.