After 10 years, I still find myself playing it.
The gameplay is all about fun, the game is all about fun. You build, fight against rival "Constructors" who attack your turf. You can set Hippies, Yobs, Mafia, even a dodgy electrician on them. This game is hilarious in every aspect. The interface can take a bit of getting used to, but you can pick it up after about 15 mins and its second nature after an hour.
To some they may look dire, but they look awesome with such a primitive engine! There are video animations at every corner - and the buildings look good.
Some very funny voiceovers and sound effects. Not much music though.
I bought this 10 years ago and I'm still playing it.
Overall - this game is very entertaining and some places quite challenging!