Anyone played it yet? It's a 284 MB download, so I'm not quite ready.

Actually its 332 Mb demo....but I heard its crap,my friend compared it with Doom 3 and said Doom at least have atmoshpere...

It sucked. I was looking forward to getting Q4 until I saw the PC Gamer review (70%). Maybe the game gets better, but the demo was 2 short, uninspired stages with worse graphics than Doom 3.