The planes are pretty much just as good as other sims, including the ones that cost $200. Now, as for helicopters, we need something else beside autorotations:transitional lift. This is the anomaly of losing lift and having to add power when transistioning from hover to ff; as far as i'm aware, fms doesn't model this (this is much more important then autorotations, imo). This also why heli buffs spend $200 for rflg2 or reflix:better heli physics overall.
Sam