@mad_x The old Garmins are designed by people that hate pilots.
But the G1000 is quite okay.
In terms of GA navigation, I prefer to have it on my iPad these days. ForeFlight and Skydemon (in Europe) have become extremely good. I know the interface in and out. And all my flight plans and custom waypoints are already in there.
Using a portable GNS 2000 receiver, I always have good sat reception.