I am just getting back into sailplanes after ten years and bought the Game Commander and Easyfly combo. I also use the latest version of the freeware FSM. I did get a chance to use both Realflight and Dave Brown's but I felt I could get what I wanted out of a lower priced sim.

My goal was to get use to using a TX box again and regain my sense of orientation before banging up the 2X6 I am working on.
The low end sims are doing the job for me plus are a fun way to take a break from the building board.

All I can say is that I wish the powered models I flew 10 years ago flew half a smooth as those in the computer simulations

I believe these simulation can be constructive way for the FNG
--> Fabulous New Guy to get some coordination and orientation skills, but they are a long way from replacing a good trainer and instructor.