Buying Pro doesn't give you any rights to download copyright material. If a site claims it does then it is a scam site. Before you can download LW you have to click the disclaimer that says "I will not use LimeWire Basic/PRO for copyright infringement."
Basic is free and Pro costs $18.88US. Make sure you get it from the official site
http://www.limewire.com/english/cont...um_intro.shtml
I think it is an excellent program. I haven't had any problems with it. But if you read the forums you'll see that some people do so it is best to use the Basic version first cause there are no refunds for Pro.