I use Virtual box on a pair of mac intel core duo 2 machines to run windows XP pro I'm very pleased with it. It essentially works perfectly. I don't care that it is only single processor since All I want is basic seemless windows functionality for those few cases where software is windows only.
it works well with USB devices. I use it to program Lego Mindostorms, and for Midi (to USB) keyboard input and some thumb drives.
it will mount any folder on my mac disk either permenantly or temporarily (these show us as X: or Y: or whatever). What's mildly annoying is that this is 2 step process: first you tell the VM to "add the drive" then you have to use a windows "run" command "net use x: " to tell windows about it. the second step seems strange to me, but you only do it one time.
I've had three things I could not figure out.
I never was able to get a windows media player to mount in media player mode so I could use windows DRM protected WMA files on it and manage it from within windows media player 11. Instead it only will mount as a thumb drive.
I was not able to get a virtual CD device to mount an iso image or burn an iso image (as a work around for getting the WMA files in a format I could play).
It will not burn a CD or DVD.
also I never figured out how to add my Samsung C310 printer to it or my HP multifunction printer to it. it does see them, it just never finds the drivers. However I'm pretty certain this is a windows driver problem and nothing to do with the VM.
I don't game so open GL means squat to me.