i really like virtualbox and i think it has great potential, what i do not like SOOO much is the CIA’s involvement with Oracle.

also: CTRL-Right / AltGr / (US: ALT key on the right side of SPACE) will release mouse/input focus of VM window.

(hit both and your mouse cursor should be freed from tyranny)

checkout: a bit of Oracle VirtualBox Innotek GmbH history