I've personally not warmed up to this style of transport yet, but we don't have that in the part of the UK I live in. I can trust a taxi because of the info on the back alongside the number plate which links them to the council.
Call me paranoid but I flat out would not trust strangers picking me up in their spare time.
But yes, bring on autonomous driving. I've always said, I'd trust a certified robot more than a human.