The SoD EA forums are a gold mine of hilarity and depression (some guy said a game released on Steam, much less PC, without proper KB+M support isn't a true PC game & its sale on Steam is illegal)
LOL, this guy would hang himself if he discovers that "Brothers - A Tale O Two Sons" is also sold on Steam without KB/M support (Due to the original twin-sticks control, this is perfectly normal).
Also, most of the whiners haven't really played the game because you don't use guns that much (due to noise and ammo problems) so no precision and quickness required and most importlantly, you have to drive A LOT and regarding this matter, a x360 pad with the triggers is really a big plus because there are subtleties in the acceleration of a vehicle that you can't get with a "binary" button ( where the acceleration is "on/off"). It's really important in racing games and gta-likes but here it goes into another dimension because the slower you drive, the less noise you make (showed by a circle on your mini-map), so driving constantly at 5km/h makes you more stealthy when driving in the streets.
And to add my two cents on the game for those on the fence: yes, there are some minor issues in this game (lack of explanations on certain matters so check the net to fully grasp the dynamics of ressources, etc) but it's really recommended for those who would like to experience a sandbox group survival game.