This is probably the best ATC game on the App Store. The graphics are beautiful and the gameplay is great. In my experience I found it to be moderately challenging to earn coins, but its not so challenging that I grew fed up with it and outright bought the coins. Changes I would like to see from the development team, however, would be to improve the spacing between landing aircraft. The "align for takeoff" button goes almost unused as I have to have a plane outright takeoff just as another one tells me its on final approach (otherwise risking a missed approach and ending that session). Its not realistic, and causes many delayed aircraft. An immediate take off button and spacing out landing aircraft more would solve this problem. Id also like to see the addition of multiple runways at the bigger airports. Other than that its a fantastic ATC game and I highly recommend it. (Note: the game does drain the battery fairly fast. I suggest playing it with a power source nearby)
Acrook48 about Unmatched Air Traffic Control