My system is similar to ETOPs, i have skydemon on a ipad knee board wi fi to pilotaware rosetta, this is used for flight planning/nav/ traffic, I also use a garmin Aera795 on a ball mount for primary navigation and a garmin495 to run the tru trak autopilot, It all works very well together with multiple redundancy if something goes down,
The ipad works well with skydemon with audio for traffic warning primarily but easy to glance at the screen if necessary,