RE: How effective are Flight Simulators...
I never had a flight instuctor. I got G2 learned how to fly on it and went to the field took off and landed without help at all. I have my real pilot license so a little understanding of throttle and elevator control helped too. I crashed on my 3rd flight when flying to close to a tree...but it reached up grabbed my plane. I would not advocate a sim then flight without an instructor but it is definitely possible if a dummy like me can do it. The sim is definitely worth it.
T/A