I'm skimming through it right now and I'm pretty impressed, seems like they actually put effort into dialogue and the "cinematic" factor is presented a lot better than most modern games.
Then again, I've only ever known CoD from the newer games my friends would play, and even then I've never played 'em.
CoD 1 isn't available but they have 2 and 3, kinda sucks but I'll look into them. $20 is a lot, that's okay though.