For a free-mium game, SimCity Buildit really is a bunch of fun - and although you can spend money on it to speed up tasks etc, it isnt pushy that way. You can play the game without spending a cent.
It's easy to use. I have been playing on my iPad, and its alot of fun. Build a city, from houses to skyscrapers, factories, shops and farms and as the "Mayor" of your city, you can do tasks, build and keep your city humming and growing - all the while keeping your citizens happy.
Its a fun game you dont have to play ALL the time- but come back to when you feel like it - and still achieve some great gains.
It's a bunch of fun - not heavy, or pushy and worth keeping on your favourite device.