when I got my G-3 I have gotten the down loads and upgrades for free from www.knifeedge.com without hassle also there is quite alot of planes for free designed by people who allow you to swap/download them for free also I have upgraded to the 3.5 and it works great.for the disatisfied go into a electronics store with your last years model camera or T.V. and tell them you want a upgrade for a discount because you bought it there last year,you will get a good laugh out of them but thats about all.
the G-2 is far inferior to the G-3 or 3.5 the graphics are better along with the physics it is also on a new software platform so the upgrades are not tranferable between G-2 and G-3 systems.