I just got cooker running on Vbox and it appears to run well. Some problems:
a) chromium fails with the message:
[christanner@christest-pc ~]$ chromium-browser-stable
/usr/bin/chromium-browser-stable: symbol lookup error: /usr/bin/chromium-browser-stable: undefined symbol: _ZN3re23RE23Arg12parse_stringEPKciPv
b) krita and calligra need to be recompiled.
Regards,
Chris