Remember that NO sim can emulate all of the problems that will plague you at the airfield.

Realflight and AFD5 have pretty good flight models, but NEVER assume that because you can fly a sim you'll do fine at the airfield.

Instead consider a sim to be a very good training aid.

Once you've mastered the sim, it's time to go out and fly with the help of an experienced instructor and a buddy box.

If you've practiced on the sim, you'll pick things up very quickly.