What are the advantages of PC-to-PC VoIP?

What are the advantages of PC-to-PC VoIP?

Jim Gurol (VP of Operations, Tierzero) gives expert video advice on: What is PC-to-PC VoIP?; Who can I call on a PC-to-PC VoIP line?; How does PC-to-PC VoIP work? and more...

The advantage of PC-to-PC versus normal phone lines, is the ability to have a free conversation with the other user, or having, for example, interactive chat, you can have, let's say you're sharing documents at the same time you're having the conversation, and you want to do it all over your computer, you can do that using a PC-to-PC VoIP.