Excellent game, great graphics, superbe "ambiance". I really like the "The War of the Worlds" look and feel!!
I know "I 'm slow" :) But I changed job meanwhile and I only played about 2 or 3hours per month. Half Life is quite long. Let say it a 40 hours game then, with the average hours I use to play, it would have taken me 1 year to finish it! (40hours/3hours = 13 month!)
As you can guess I played it a little more during the last few month ;)