A short revival of this thread to say that if you've missed this gem until now, there isn't any reason to delay it further. I bought the metal case version with the map of the zone for 10€. Applied the patch 5 and it works fine (only one crash during the whole WE).
I like it... a lot. The atmosphere is deliciously creepy, it doesn't feel as linear as HL2 by far (although a good part of the events of the main plot are scripted) and the firefights are brutal even at the veteran difficulty setting. AI is mostly good to very good (with the occasional dumb move but it is not a real intelligence after all).
On my old AMD 64 3200 2GB RAM with ATI 9800 Pro (128 MB ram), it runs nicely on med details and static lighting... and it looks pretty good already.
I must be 1/3-1/2 into it and I can't wait to go back home to play it some more... I recommend it highly. Yay for commie game designers
