Love it but absolutely hate growing in game. You need special items to grow storage and city borders. They are easy to get early game, but later, it's laughable at how hard they are to get and how much it requires to expand the borders just a little bit. I have completely filled my city, almost all buildings max level, but no way to expand with out real world money. It's fun until you are almost required to spend money or months of your time to expand just slightly. Been playing for 3 years now.