Had to wait for the car to arrive for quite a long time but the driver was very good and helpful.
I asked for a meet and greet at the airport and ended up in searching te driver all over the terminal.
Since I couldn't find the driver I had to make an international call with my non US cellphone to ask what went wrong. After that call a driver was sent to me at the curb.
The driver itself was great, but the system Viator/Carmellimo.... I will NOT be using it again!
Our driver Oliver was very punctual considering our arrival time. He was very clear on the meeting point. And he was a fine guide through the streets of San Francisco on the way to the hotel. He'd explained a lot of thing that was useful to know for visitors like us and place to visit too. Thanks Oliver