Spas, yes Sims can be very good for training pilots and others, my point is that there are major uncertainties about the way the plane flies and the actual war fighting software has not been written, the probe of concurrency.
It will be interesting to compare and contrast the abilities of the F35 according to the SIM now and the abilities of the F35 in the SIM when the aircraft's final flight characteristics are programmed in.
I assume the Sims were designed to replicate the as promissed by LM performance, not the as yet delivered performance.
The project has as we all know suffered much death by PowerPoint, let us hope that pilots expectations of the real plane are not raised too high by unrealistic sessions in the initial Sims.