Faster loading, and disc doesn't have to spin as often.
heh I thought you could just install it and play without the disc... I guess that prevents people like renting the game then burning it to their hard drive.
Yeah one of my friends bought the 120GB HDD and called me up and said to come over and bring my hard drive because he rented a bunch of games that they where going to steal... I just thought "Nah"
http://www.bingegamer.net/2008/so-how-much-time-are-you-saving-xbox-360-nxe-hard-drive-install-chart/You are correct.