Zero Mouse concept by Oliver Rosito

Surfing around the net I found this intersting concept of Mouse named "Zero Concept" designed by designcar from Istituto Europeo di Design Madrid.
It is clear the transportation design influence in his approach, it is very attractive and well done the only doubt I have is about the ergonomics because of the empity space on the sides...usually that is the point where we put our thingers to hold securely the mouse!