I bought this game and will need to see a lot more dev support before I fork out more coin for additional planes.
My impression after playing it over the weekend is that this is what became of the IL-2 mod Knights of the Sky, with a lot of features missing from IL-2.
The gem in this sim is the models, flight modelling, physics, and sound.
The interface is atrocious and counter-intuitive, the campaign is not exciting (I don't believe there is any perisistence here, just randomly generated missions), and the multiplayer, as far as I can tell, is coop missions only, so if you die you have to wait for everyone else to finish the mission; no respawns.
I've already paid a premium for an incomplete product. Finish it and then we'll talk about me forking over more dough.