FS2020 user here. Just like the Longitude/Latitude before it this is a great looking model both inside and out from this developer (top notch). They need a sound developer. That said here are some major issues that need to get addressed in future updates. I'll come back with another quick review if these major things are fixed:
1. Both landing lights externally don't turn on when the Taxi/Landing light switch is toggled. The right landing light doesn't illuminate on the ground when the switch is turned on. Only the Left landing light shows on the ground from the cockpit.
2. Cabin light switch turns off the right lower Garmin screen when it's turned off
3. Engine start switches don't turn to start the engines
4. CG is off by default (every seat is full)
5. No tail logo light. Maybe this can be slaved to the NAV lights to make things easier
6. Speed brake lever not animated
7. No clear way to start the engines - Aircraft is looking for an APU that Phenom's don't have. All switches are good to go but the engines don't start without CRTL-E
8. Vertical speed knob is in reverse
9. TCAS doesn't work
10. Cockpit panel backlighting that is directly over the large Gamin screens doesn't turn on.
11. Overspeed triggers before the speed hits the tape
12. Needs windshield rain effects.
13. APU still shows 'ON' on the PFD when the aircraft is in cruise. The Phenom doesn't have an APU. See item 7.
14. No contrails at altitude
15. WT Garmin integration needs a lot of work (error messages on the PFD when there's shouldn't be). Just follow what's going on with the default Longitude for reference.
16. The Garmins in this bird are looking for an Autothrottle when this bird doesn't have this feature
17. Distance Font on the lower center Garmin Active flight plan is unreadable
18. Only one livery
19. Really needs a Taxi/Landing light toggle like the real bird