Just got the G5 add-in and wish I got it sooner. That said, I did find some bugs as follows:
The GPS mode is not showing on the HSI, e.g. ENR, LPV, LNAV, etc.
The flashing WPT message does not appear on the HSI when approaching a waypoint.
Unable to set the altitude bug. As soon as I click on the knob, the PFD menu disappears.
No glideslope or CDI indicator on the PFD.
No way of setting the heading bug to the current heading by pressing and holding the knob.
No green rate of turn triangles on the PFD.
No heading bug, NAV course or track on the heading tape on the PFD.
No audible altitude alert tones.
No flashing altitude alerts.
The -2.5° bar is missing from the PFD.