Most people complain about not having enough room to move (which is precisely why I like the map so much).
I've had a few complaints on Hans being to hard on this map.
Also a few complaints that games get boring because everybody always camps at the same spot every wave on every game (the room in front of the cockpit at the door near the stairs)
Had one guy join one of my servers, start a rant on voicechat, banging on about explosive decompression and zeds entering though the windows not being blown away and then he left the game before playing a wave.