This is a good game, but I wouldnt recommend it based on the price combined with the run time. I beat the game on normal in roughly 7 hours play time. I honestly wouldnt mind trying a higher difficulty if there was an insentive, but the equipment is pretty limited compared to other space games (I basicly hit the best equipment within 4 hours of play time). After I got my gear I was expecting to hit harder areas especially since some were considered "risky" and "dangerous", but the difficulty seemed to stay roughly the same. My problems with the game summarized would be: there is only 1 ship class size available (that I know of), the run time is to short, and there is a serious lack of equipment variences. I believe there is only 3 different lvls to each type of equipment, which means that you could honestly have one of the best weapons in the game within farming 40k-80k which may take you an hour at the start.
Also on a side note I hated the mining :P it was a pain in the butt to do and it wasnt particularly worth it compared to mugging people.