Tesla launched its robotaxi service in Austin on Sunday as its Model Y vehicles drove around a select batch of riders who gave rave reviews about smooth, convenient rides that were available for the cheap price of $4.20 .

The company has begun a test run of the driverless cabs, years after CEO Elon Musk vowed they would be on the road.

The June 22 launch of Tesla's robotaxis in Austin, Texas, actually occurred. It's a tentative first step for the company, however: a human "Tesla Safety Monitor" is accompanying the first riders. There are also only ten cars and rides are limited to certain Tesla users.