Have FS Global 2010 for some time and am still very happy with it. It evaluates the landscape display on visible and moves it a step closer to reality. In flat areas, however, it is not noticed (eg Sahara area). To see the full potential, you have to fly over the mountains like the Alps, the Himalayas, the Atlas Mountains, Andes, etc. But also between the mountains and smaller hills are depicted realistically.
It enhances any textures, if you want better ground textures you have to install your own addon, eg "Ground Environment X".
Where there is light, there is shadow, because of the immense scope and abedeckten area (all the earth) have at several airports and water level error crept you obviously can resolve only manually afterwards. This would actually the developers to do, but thought is probably "so we never be so ready" xD. That's why they give the customer a tool in the hand to repair itself (AFX Demo). With which you can at least correct the erroneous Airport Altitudes.
As a "Wild Wings" are me have noticed a number of such faulty Airports (estimated 30 - 40 I have already corrected). Power really fun track them down and find out the correct height over the Internet and then to correct with AFX. Far more annoying I find the height error in the waters. This looks partly arg blatant, and that is correct rather complicated, because I have not yet dared over it.
Especially bad it looks to FGBT. Such errors occur relatively infrequently Fortunately, especially in the waters. There are rather the wrong altitude data on at the airports.
Nevertheless but a highly recommended addon that everyone FSXler, or FS2004er should have on the board. But you must also be aware of the downsides clear.
I would appreciate it very when it is "2012 FS Global" or 2013. give sometime maybe, but then without those errors =)