ORIGINAL: shschon
I have FMS and realflight. After first try of Realflight I never look back. You really get what you pay for.
I second that. I have both - installed but FMS is just to enjoy the view of the plane not the flying properties. The problem in FMS is that the program has very simple flying physics regardless of the model, and the model data input parameters to built in functions. It doesn't work that way. I don't know why it is like that but in example if Cap 232 has the same dimmensions and profile as Extra 300 it doesn't fly like Extra.
Missing in FMS is in example propwash affecting control surfaces, ground effect, tip stall, engine torque - just to name few. But it is great free simulator to learn "which way is up/down and left-right". I used it a lot before I got RF G2. I tried RF 3 and 4 and they are even better, but not as much to be worth buying new top of the line PC.
ORIGINAL: shschon
As to the A-10 in realflight add-on 3, don't expect too much. It is one of those plane models in real flight add-on that have some issues. It floats too much when you try to land.
Man, I just ordered Volume-3. I will try to replicate this Guanli A-10 and see how it goes. GWS C-47 worked great and it is 100% accurate to the flying real model.