I know that is very good to install games on the Xbox 360 hard drive for better performance & the disc won't have to spin constanstly, that mean it also reduce the chance for overheating & RROD, but my Xbox is an Elite, so 120GB & I have about 25 games. If I install all of these games, it will eat all the spaces on my hard drive, & I don't think 120GB is enough for all of these games, even 250GB. This is the disadvantage.