I found it to be pretty complicated. Maybe I was just a little too young to fully appreciate the nuances of the game, but I found SC4 had a phenomenally-steep learning curve and I had to focus way too much on micromanagement. It got to the point where I'd build a city of about 15,000 residents and then I would either go broke or everyone would move out (at which point I would go broke). I think the best I ever got to was around 28,000 residents. It really killed any long-term gameplay prospects for me.
