Fun at first, then becoming tedious, turning into boring. It either takes a lot of time or a lot of money to advance in this game. At a certain point, if you don't spend money, you're going to be doing monotonous hostile killing just to try to advance your station. If it was a little more balanced of storyline and mindless grinding, it might not be so bad. Unfortunately, they let you start missions that you're too low to complete so you can either pay or kill hostiles for hours/days.