Less than four months old, UberCab's mobile app for on-demand car service has become something of a breakout hit in San Francisco this summer. The startup has amassed a fleet of 45 SF drivers to cater to the whims of the early adopter urbanites and, so far, it's delivered on its promise to provide swift service with the average wait time hovering between 7 to 8 minutes. To certify UberCab's buzz factor, a group of prominent investors led by First Round Capital have plunked down a cool $1.25 million for a piece of the company's seed round . On Friday, we caught up with UberCab's chief executive, Ryan Graves , to put UberCab to the test. See video ahead. Note: for those with Androids (and too lazy to SMS) UberCab will start beta testing an Android app this weekend, with plans to roll it out in one or two weeks.