Speaking as a long term professional rotary pilot, I'd like to say how impressed I am for all the hard work that's been put in to the SkyDemon product; it's an amazing aviation tool, especially for pre-flight planning.
I use a non 3G Ipad with an external Garmin 1000 GPS unit, which connects very easily and rapidly. In the air I keep it available as a back up to the certificated equipment fitted in the aircraft.