Over the last summer I got back into flying RC again after a 15 year hiatus. Instead of crashing a few planes, I purchased Realflight G3.5. I found that it is nearly spot on with real RC aircraft. I was able to get a model in G3.5 that I was going to use as my trainer aircraft in real life. I practiced on the Sim for a while, while I was building my model. Once completed and I took it out to fly I had no problem at all flying. The flight characteristics were almost identical to real world flying.
I tried many of the freeware sims out there like FSM, but none of them compared to Realflight. I also looked into Phoenix, but I found it's flight model to be lacking. I think this is just one of those things, "you get what you pay for". I had my doubts when I purchased G3.5, but once I got it and was able to compare flying on my PC to flying RC in real life. It saved several possible crashes and lots of wasted money in repairs or damaged equipment... I cannot stress enough that a GOOD sim will help your flying.... I actually enjoyed using G3.5 so much that I went ahead and purchased G4 since I was getting into Hydrofoams and G4 had water flying. No regrets....
BTW - I do have Realflight G3.5 in almost new condition that I am willing to sell. It has everything including the USB controller.