As a designer (of the graphic variety) I like it. Some (most?) of you might actively dislike it, but I think it's far preferable to the pseudo-Asian blandness of the MG3, 5 and 6.
It's just as polarising a design as the Juke, and Nissan doesn't seem to be having any trouble shifting those by the tens of thousands. Polarising design is always memorable, even if its memorable for the wrong reasons. A production version of this, even a considerably toned down one, would certainly get people's attention and start them talking about the MG brand in the UK.