Realflight basic for me. $99. not all the bells and whistles, but a good selection of aircraft and airfields. The instructions are vague at best, but I got some tips here on RCU. It has some pretty cool stuff like, smoke on/off, dual rates, speed brakes, brakes for jets, wind, and so on. I usually fly some touch and goes on the trainer, then practice warbird take offs/landings, then go to  the L39 for speed! I think I discovered how easy the Extras are to land, even though they are quite twitchy. Does anyone think I can base my next plane on what I experience on the sim? I love practicing knife edges all the way down the runway! sweet!