With my recent snafu involving trying to get a stable Windows 8 machine running under VMWare Workstation 9, I decided to give VirtualBox a try since it's free. I didn't have anything to lose at that point.
Now I have a stable, 64 bit install of Windows 8, and the performance is superb. It didn't do much for me the last time I tried it, but now I'm really impressed. I am running Visual Studio 2010 and 2012 as well as some basic software like Office 2010, and everything runs smooth as silk. VMWare Workstation 9 has been giving me some grief lately with my Windows 7 machines too, so I'm strongly considering moving to VirtualBox for all my development.
|Not a big fan of Metro, but it works fine under VBox|
|VirtualBox main window - you can see VM info at a glance|
|It has a nice media manager - it shows all your hard drives and ISO files|
|Guest settings are intuitive and on par with VMWare Workstation|
|It has an extensive log|