Played the demo a bit before I left to my parents last week, yes it's out for that long.
Well, cannot really say how it is yet, was a bit unusual again since I didn't play OFP for some time.
Whenever I see it in a store, I want to buy it, but I think I should save my money for other things first.

Ok, maybe my first impression from the demo, well I died a lot and the AI surprised me a bit from a distance, didn't really seem to react when I was close.
The Depth of Field seemed weird to me, I set post processing to low because on high almost the whole screen was blurry and that irritated me quite a lot, felt like I needed glasses.
I also tried some of the included vehicles, a HMMWV machinegun which was about as accurate as a sniper rifle I think(it was mounted, but the seemingly deadly accuracy surprised me a bit), a truck that couldn't make a turn and stqay on the street(the turn axis was also in the middle of the truck and not at the rear wheels, which also felt weird).

Also the demo is MP only but I opened my own game and played vs AI, didn't try real MP yet. Not too happy with it so far but I want to try the demo again, just can't right now, no good gaming computer here.
I think chances are 40/40 that I will either get it as a budget title or wait for "Game2"(the last 20 are that I will get it soon for the full price).