Hello, I would recommend the Reflex. I have tried three simulators (bought them).
Easyfly - ok. but unrealistic - no ground effects
CSM - DOS based, never run on my computer
REflex - great. I take flight lessons and my trainer uses it on my recommendation (!) now. Claimes this is really realistic.

G2 I have never tried - according to reviews I saw on the web this one is excellent looking too but rather game oriented.

Good hoovering. Uwe