VirtualBox and Simultanenous Guests

I have been using VirtualBox for a while now, and I like it a lot. Especially when I need to run two guests OS simultaneously. With VMWare player or server, it would bring my system to its knees. However, on the same machine, I can use two guest OSes in parallel without a problem on VirtaulBox. So, if you like me, need to run multiple guest OSes simultaneously, you may want to give VirtualBox a trial.