I have G2, G3 (and all 5 add-ons) and Aerofly Deluxe on my PC right now. If I could keep only one of them it would be AFPD. AFPD has the biggest variety of planes right now an that is a major plus, best 3D physics IMO and hands down best looking models. G3 is ok but still not as stable as G2 IMO, they keep updating G3 so it might be the best someday (I got tired of waiting). G3 has online multiplay which AFPD and XTR lack otherwise I would have gotten rid of it long ago..