Gameplay, graphics, interface, etc. is great. I found it absolutely addictive to the max.
HOWEVER...
Despite the fact that the box indicates "Compatible with Windows Vista and Windows 7", it most definitely isn't!
I am running Windows 7.
I kept getting to the same point on the first campaign map and the game would crash. Even with the graphics settings turned down.
Searched the internet and found I was not alone. It would seem that a number of people have found a "modified" file that has resolved the issue, although that didn't seem to work for me either.
Ultimately, having got addicted, I very soon got bored. Uninstalled it and played
Railroad Tycoon 3 (PC CD) instead