I have a G940, and my experience is that the heli is very nervous, that could be due to the curves.
But also when trying to rotate the heli with the pedals during hover doesn't work sometimes, it's like it's on a spring, I can turn it a bit and when I zero the pedals it turns back again. I have flown real helicopters myself, and I don't remember that feature...
Suddenly the game starts acting like a helicopter, smooth with cool bankings.
I get the feeling that most flight sims are developed for mouse, keyboards or game-pads, not for joysticks or flight controls, It sounds wrong, but the control says so. Because when i go back to using the keyboard and mouse, it behaves like a helicopter again.
I have to try the curve thing and the logitech Profiler, to see if things is getting better.
/Wiken :)