If you're traveling in San Francisco and not in a hurry, there's no need to purchase Fast Track.

Waited in line for 15 minutes

Thrifty's human-computer interaction machines are very user-friendly. If you have already booked a car, you can have a video call with the company representative directly on the machine. It’s as good as talking to a real person, and everything can be done in a few minutes without having to queue at the counter. It’s surprisingly advanced and convenient.

Was very expensive for the short time we had it is my only complaint