LW is just the medium. The files you dwnld are from other peers just like yourself. That's why it's called peer to peer (P2P). The LW program is 100% legal. But what you do with it is up to the user. LW has 2 versions, the free version & the pro version which costs $18.88 from here: http://www.limewire.com/english/content/download.shtml