On the subject of spinning in FS, I never found the M$ flight model at all realistic in this respect. If you want to know what a spin is really like try the original Flight Unlimited. In fact, the Looking Glass flight model knocks the M$ version into a cocked hat.
That's been the reason behind many a question I have posed in these forums.
How much like an actual aircraft can a sim be? I know huge allowances must be made for the lack of G forces, lack of visual disturbances, lack of basic feel of the controls, lack of danger and so on.
However, in the strictest terms of the aircraft behaving how a real plane would when one thing or another is done to the sim controls, how close can it be.
I hope to find out shortly, in so far as I have an intro flight coming up. From what I hear, I may or may not get a reasonable go at the controls. Some have said they were permitted to "basically" take off and land the plane, by the instructor. Who knows.
Will an instructor who comes across a mature person with an obvious brain, who claims to have had extensive experience with Computerised Sims, be inclined to allow this person some freedom (within reason, of course). Or will most consider this person the novice with no idea and treat them with more trepidity because of a perceived over-confidence? ;D

Apart from a knowledge and familiarity with the gauges and their purpose, is there really any advantage?