What are the advantages? ... Absolutely none!
If your XP is working fine, don't bother.
Mine wasn't. My fault and I couldn't find my disc to re-install it so I went looking for XP pro or XP home and couldn't get it anywhere. So I got this. I eventually got an XP disc for $11 but the Vista money was already spent.
Soon the only system supported ... can't Microsoft get in trouble if they do that?