G500/600 reliability
We've done 30 hours or so with a G600 so far and no problems. The main units other than the display come from the G1000 system, and the biggest failures in G1000 come from the AHRS. Repair is always by swapping out a box - held by Garmin Europe in Southampton, UK. Dealer needs to do the change as a special un-lock softeare card is needed to set the new unit up and check/amend software level. It's still much easier to service than the G1000.