I have, and still use, that simulation myself.
It's superb .... and kind of really captures the infancy of flight from a combat perspective during a period when horses still went to war, tanks hadn't quite been invented (they were going to be called "cylindricals"), and the attitude of "a certain British army leader" (before establishment of the RFC) is quoted to have been ....
"aeroplanes are totally useless for military purposes" 
I also use IL-2 STURMOVIK .... which I moved to recently too.
I find an FS change is as good as a rest .... and these simulations are a nice break sometimes from flying and developing heavy historic metal for FS

Mark C
AKL/NZ