Flight sims can be useful for instrument training. I recommend checking out VATSIM. It's a network of controllers and pilots where you can really get a feel for comm procedures as well.
http://www.vatsim.net/
http://www.vatsim.net/
Geese said:As a CFI/CFII, I must warn you, by flying simulators like MS Flight Sim you are going to seriously piss off your flight instructor, because he will be trying to teach you how to fly WITHOUT looking at the instruments and by looking OUTSIDE (pitch attitudes, bank, etc), which is the OPPOSITE of how you fly computer based simulator. I know this all too well, I did it myself.