My Son just started a few weeks ago. Looks like he is build a nice set up. He started another on my iPad over a week ago - we get attaked a few times a day but he has built up to level 5 defenses with little effort. His clan is going well.
I looked at it and thought "Dang! I want to build an app like that but instead of warring clans you have different factories building, selling, gaining power, taking over smaller ones, influencing economies...heck instead of all the weoponry and defenses I could write in all about equipment and processes!
I think I would be one of 5 people to buy it