I've used it merely for the convenience, sorta like Uber/Lyft. I'm sure there are certain circumstances where some independent driver at SFO could get me to the city for less but I appreciate the consistency and convenience of the apps.

One time my wife and I had way too much to drink and surprisingly, even in the middle of nowhere Ohio (Cedar Point) I was able to book a place right near the park from my phone while waiting in line for a rollercoaster. Very rad.