While I play (test) more and more missions with the Beta version of the Shilka SIM, I got the impression that it is quite a handsome, user friendly system. I have similar feeling towards it, as I have for the Dvina.
Hpasp Free SAM Simulator, "Realistic to the Switch" (U-2 over Sverdlovsk, B-52's over Hanoi, F-4 Phantoms over the Sinai, F-16's and the F-117A Stealth bomber over the Balkans.) http://sites.google.com/site/samsimulator1972/home