Steam PC user.
The dead zone for mouse and keyboard and the flight stick I use is way too big to pilot effectively in multiplayer, which is the bread and butter of this game.
The long tutorial that is the campaign cannot be completed due to a known bug that causes an endless load between missions 8 and 9.
The audio for the cutscenes does not sync with the video. Many have said this is a vSync problem. I've tried adjusting vSync both in the game and on my PC. It is not a vSync problem.
Control identification in the user interface is a mess. The buttons referenced rarely exist. I found later if I roll the mouse wheel, I get keyboard commands. Even then, proper identification is inconsistent.
If none of these things bother you, feel free to waste $40. Otherwise, save your money until these specific problems are patched.