One issue with Sims (at least with ordinary yokes) is that the trim is poorly represented. In a real aircraft the "zero force" yoke position (with associated elevator position) can be anywhere, selected by the trim wheel.
With a PC sim yoke, there is one "zero force" yoke position, because it is just a tube attached to some springs, and the elevator is "moved" with the trim wheel.
And unless the yoke has a central "detente", ie a well defined "zero force" position, (some do), trimming becomes too fiddly to bother with. Which is not good practice.
Imagine climbing 50 feet to get back on altitude. In a real aircraft, assuming you were trimmed, you would just pull back a little to raise the nose slightly, gently get back to altitude, then release the yoke pressure. No re-trim required. In a PC sim with a typical sticky yoke and no detente, the new "zero force" position is a little different now, so you have to trim all over again, and so on every time you touch the yoke.
With those caveats, I have found a sim very useful for some exercises, eg tracking away from an NDB in a strong unknown wind. The sim is also cheaper and the strong wind is easier to arrange
