i bought it for the same reasons and i havent been dissapointed :)
800 mb depending on how fast ur connection is it would take around 1 tot 5 hours.
i once downloaded the witcher 2 via steam because i was too lazy to go to the store and i wanted to play it asap. terrible mistake, it took almost 2 days to download :S
gosh i hate steam.
Wow! I thought mine was slow when it took about 40 min. I guess I did well.
Education: that which reveals to the wise,
and conceals from the stupid,
the vast limits of their knowledge.
Mark Twain
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