My reply is NOT a bash of another sim....in fact since I continue to volunteer there it would be stupid of me to bash it.
However, I would like to share that I did battle in my YAK-3 upside-down on Saturday morning.  Turning was a pain, but I did it for over an hour.  When it came to shooting I did turn upright most of the time, but any other flying was simply upside down.
It might help to mention this was in 1.5 not 2.0.  And the only reason I mention it is to point out that I came to AH for the added realism.  1.5 is a game not a sim, plain and simple.  Taken for what it's worth and how I define it, it's a good game.  Game does not necessarily equal sim though.  I think there is room enough for both because they really can't be compared on any sort of level ground.
Fury