Will try it out myself. Thanks.
EDIT:
Ok, have tested it a bit. Noticed it was slow to begin with. It appears it to begin with only gets 256 mb of memory. To increase it, and to configure it in general, you will have to go to
"<where_you_extracted_portable_ubuntu>\config"
and open the file in that folder. You can set the memory there, if needed (I set it to 512 mb, and it is much faster now).
Also, some features in Ubuntu does not appear to work. Like System->Preferences->Session, or System->Preferences->Windows. Also, sometimes linux is not directly affected by when you click "outside", like in Firefox running under Windows. Menus can still be there. And there does not appear to be an easy way to access Windows files from Linux (it runs in a VM).
That was mostly negative, but that is because I am picky and notice such things fast. Going to explore it more now!
There is no greater virtue, then the ability to face oneself.