I get better results during first try after I reboot PC.
Tested (Fast Mission, "Clear" weather): Su 25, Bf 109, FW 190, KA 50, Su 27, A-10 C
Wait 1 min after mission is ready and press then fly. Works for me most of the time now.
FW 190 and SU 25 cockpit are really great. Very readable and you can move your head just in front of the instruments.
Picture is a little to bright.
Nearby passing Wingmen are a great experience.
(I dont like the flickering of the rotor shadows in the KA 50)
The Su 27 has got a great view!