so far its been mostly enjoyable playing this, a few gripes the objective pointer can be a bit hard to read at times, especially when the level you are looking for is either above or below where you stand. Also its ridiculously easy to kill yourself in some maps if you dont look at the floor most times "which is hard when you are getting hammered by hordes of demons" many maps have hard to spot holes in them so you fall to your untimely demise if you misstep.
Actually ran it on my old htpc core 2 quad with a 560 gtx ti from msi (just to see if it was at all playable) at acceptable framerates, though i had to lower settings a good deal
, so even if you dont have the latest and greates gfx card, you should still be able to have a good time.
Productivity is a state of mind.