This game is more difficult to play differ than SimCity 3000 because of the complexity and it is to realistic. The programmer have put a lot of afford to come out with complex algorithms for city growth in this version. It makes me headache sometimes. As a result, since 2005 I'm still a bad Mayor and of course with a lot of debt. I stuck in this game.
I heard Maxis will come out with the newest version, more complex and the graphic will be more realistic. I'm pretty sure.. more headache.
More info at SimCity 4 Wikipedia
Happy gaming, brada!!!