I'm enjoying HL2 so far, depite how much of a pain in the tits Steam was/is to use; albiet it is a bit short on actual variety of enemies and weapons (there's only about 2/3 distinct enemies I can remember.... zombies, soldiers, ants, and far too few guns).
Good to see they've fixed this, though. Stuttering seems to get really bad in the 3rd chapter(I think) of the game.