I bought it for 15 bucks on a preorder,I'm so glad cause the solo game is so monotonous it gets boring for me quickly.At least Left 4 Dead had somewhat of a story line in the single player mode.If you like just running around and shooting then it will be ok for you.
I have to say, i bought it for about 11 quid and I think that for that its a pretty good game. Nice graphics, good weapon models, havent come across any bugs yet myself, I like the maps and the gameplay is ok (I agree that its a tad monotonous but at least the trader moves around meaning you cant just weld urself in a room and camp which is cool and the maps are pretty varied as well which makes it better). The only thing I've noticed that I really dont like is the flashlight...because
1. only on the pistol 2. looks fairly nasty graphics-wise (really pixelated and too solid)
I think with some cool weapons/gameplay/map mods, this will be a truely great co-op game!
Also, it's not only on the pistol, it's on all sidearms and some primary weapons (such as the normal shotgun).
Also, is it just me, or does it seem lack there is a very small weapon arsenal in this game compared to what expected? I mean L4D didn't have many weapons either, but I expected more from this one. (More assault rifles, sniper rifles, etc...)