I’ve had hit-or-miss experiences with virtual OS’s on my home machine. When I had an Apple powerbook, Parallels was awesome. It just simply worked with no hassles.
On the Linux platform I have not been impressed with any of the virtualization packages until just a few days ago. A colleague showed my Oracle’s Virtual Box software. Just like Parallels, it just works on Linux. No hassle, no fuss, no issues.
So far on my Fedora 17 desktop I have Windows 7 and CentOS 6.5 running. By this evening Fedora 20 will be running as well.