Over four rides to the airport this year, these things have happened:
1) Three of the times the drivers claimed the AC wasn't working, and we had to drive on the interstate with the windows down.
2) The driver missed the exit for SFO, and drove through the median to get to it
3) Two drivers did not know how to get to OAK
4) I (a pregnant woman) was traveling alone with my infant son. Driver did not help load stroller and luggage into the trunk. Threw luggage out of the trunk onto the curb when we arrived at the airport.
Transportation always kind of sucks, and maybe this is the best you can buy for $72 from Berkeley to SFO. My Uber experiences have been uniformly worse than my taxi to/from airport experiences. But they are slightly cheaper and easier to schedule.