I fully agree that FS can be amazingly helpful throughout flight training, and well afterwards, it certainly was for me, and continues to be. Indeed, in many ways real flying is much easier. Real aircraft are much more forgiving of small mistakes, but less forgiving of large ones I think, hehe.
FS training can also have one other amazing and entirely unexpected side effect though, when it comes to emergencies.
I got my PPL in 2002, after about 13 years of almost daily flight sim use. During one very memorable flight, about 15 hours after getting my license, I experienced a complete electrical failure.... at night. One moment everything was fine, the next I was in complete darkness. No radios, no lights, nada.
For a relatively new pilot this is quite an experience to go through! Obviously my tension shot up immediately, but I turned on the flashlight that I hung around my neck on every night flight, and ran through the checklist. I cycled the master and battery switches several times, but to no avail. It became very clear to me that my electrics were not coming back. Happily the engine was continuing to run nicely and I had about 3 hours of fuel on board. Unhappily I was flying a Piper Arrow 3 with retractable gear, and would have no way to know if the gear was down and locked without the indicator lights. It also didn't help that I had my girlfriend and her best friend on board.
As I struggled to come to grips with this situation, something in my mind radically altered almost instantly. To this day I still can't properly describe how the mental change occurred, but my mind suddenly convinced itself that I was in flight sim, not in a real aircraft with two rather concerned passengers on board. The moment that change occurred all of my worry and tension vanished completely, and I was able to get on with the business of flying the plane with a cool head.
Since I had no transponder or radios (did not have a portable nav/comm at the time, but I do now!) I decided the only course of action was to orbit near my home airport and watch the traffic pattern and try to find a way to fit myself in. Without a transponder or radio, in pitch darkness, the tower wouldn't really know who or what I was. I performed the prescribed 120 degree turns in triangle formation several times and waited for a light gun signal, but none came over a 10 min period, so I decided that I had best get the thing on the ground somehow. I observed the planes in the pattern and slotted myself in closely behind one on downwind. The real butt clenching moment was lowering the gear. I thought I felt the nose pitch down and the wind noise increase slightly, but there was still no way to be sure without indicator lights, since in the Arrow you can't see any part of the gear at all.
The approach was certainly interesting, with the flashlight between my teeth illuminating the airspeed indicator and the flare was one of the smoothest and longest I've ever done, waiting for the inevitable crunch of prop vs pavement, but it never came. I was greeted with the surprising and very relieving chirp of the main wheels being whipped up to speed on the ground.
And then the most bizarre thing happened. The moment the nose gear touched down all the electrics came back on! If it wasn't such a dangerous situation it would have been hilarious. Murphy at his best. I quickly braked off the runway and tuned in to the tower frequency, only to land in the middle of a serious verbal reaming from them. After they stopped yelling at me I explained my situation and decisions. There was a long pause, after which they said "Under the circumstances, well done. Taxi to parking." I discovered from the mechanic the next day that the problem was caused by a broken grounding strap between the battery and airframe, due to metal fatigue caused by engine vibration, and that the jolt of the nose gear touching down had reconnected it slightly, allowing the alternator to function again.
Anyway, as soon as I shut the plane down and whipped off the seat belt, the FS world vanished, and the real world came back with a vengeance, along with a fair bit of shaking from the loss of adrenaline. I figured it was best that my girlfriend drive me home from that point, but not before we stopped at a bar and got me thoroughly trashed.
So, long story short, extensive FS training can have one lovely and remarkable side effect, one which I hope to never need again, but I'm glad it's there. I also religiously check the condition of the grounding strap before every flight now.
Flight Simulator has had a special place in my heart from that day on.
Cheers,
-Mike