I had this on disc back when it first came out. There was some effort by techie gurus on a CIV forum just to get the game to install, and then frequent visits to solve crashing issues. Not just me - those gurus were pretty busy back then, solving issues with CIV for loads of people across different operating systems.
I remember getting through the game eventually, but all those issues spoiled the enjoyment. CIV is the only game, out of all the others (C3, Pharaoh, Zeus, Emperor, Children of the Nile) that I've not replayed over the years. I just look at the box and shake my head sadly.
Having said all that, when I saw it here, I had a moment of whizzing around the room in glee. Disc free, and maybe, just maybe, all those problems sorted. I want to buy it now, but my head is telling me to wait a bit for others here to come along with the thumbs up that CIV is looking good!