It's just like downloading DVD rips, except you're downloading 25 gigs at a time, instead of 7 to 8 gigs for regular DVDs.
No shit.
80gb of my drive consists of the Battlestar Galactica 1080p bluray rips for the entire 4 seasons+premiere+webisodes+Razor+ThePlan. Took me a good week of downloading nightly to get it all.