I always use Uber when arriving at SFO now. I know the pricing ahead of time (Uber does flat-rate between SF and SFO). I don't have to worry about having cash on me or getting a disapproving glare when I ask about using a credit card. I don't have to even think about calculating a tip. If my driver is rude or unsafe or anything negative, I have an easy avenue to report that without having to make a phone call, wait on hold for who knows how long, and then push my complaint into the black hole. If I'm especially tired and want to treat myself, I can order an Uber Black instead of an UberX. Hell, most UberX cars are nicer than most cabs I've seen.

The only downside is that there's a short wait if I don't time the ride request just right. Since there are tons of taxis at the airport, I wouldn't have to wait taking a taxi. But the above more than makes up for this point.