you can spend hours or even days! building the cities, roads, parks, trees, ports, etc, etc and finaly have your perfect city. in my opinion it is the best city-builder on the market. one minus - I had some problems runing my mp3 files under game folder instead standard music.
Sim City 4 is a huge leap from Sim City 3000 with a lot more detail in both a graphical sense and an economic sense.
The game has the same distinct features of any other sim city but allows you to do more.
As mayor, you have to build your city, maintain it, keep an eye on your finances and ordinances, conduct deals and even destroy it if you wish with a giant robot!
It needs a good system to run on, but overall, you can have hours of fun with it.