*** Posted by run *** 
[How realistic are the landings in Falcon 4.0? When I try to land, in the "ACE" mode, I always crash, even if my AOA is right (green circle next to the HUD). I'm asking this to a real 
F-16 pilot
thank you]
Like I said earlier I have only flown Falcon 4.0 once, so I can't answer your question. 
Having a green circle is not enough to be able to land the F16 though. You need to flare the jet at the end. Else you will crash.
Regards John Raahauge RUN