I have the Realflight G4.5.  I love it.  I used to fly a PT60 and I will have a new one in the air in a couple of weeks.  The first one I flew was back in the 80's so I realize I am a beginner again.  But what I do know is that the PT40 in Realflight has very similar flight characteristics to the real a/c.  And when you load a differant bird you can really tell the differance.  Flying the P51 or a Jet on the Sim is so differant from my PT40.  And you see and feel the differance with the Sim.  Buy it!!!  They are a great tool for learning.  I will be adding the expansion pack that has my next plane (Tiger 60) before I consider flying it for real.  I have a question...you do have a guy with a buddy box to help yoy, right?