I just recently tried the first of the payware modules, and I must say I am impressed. Ridiculously expensive but this is not like anything I have flown before in a flight sim. Graphics are fantastic, performance is like 150+ fps and sound is great too if I find mods (I got some Klimov sound mod for that Mig which is totally insane). Neeldess to say that is not possible to just pull on the stick with these place, you really see them moving through the air, which makes all my previous sims popamole.
I flew Lomac in 2004 or so when it was rather new, but it was nothing like that. Really impressive to see the improvements in the flight models and engine.
Made those screens after tweaking for a day, and here some samples of the sound mods I like