Pros: We stepped off AirTran, tapped some buttons on an automated kiosk, got a printout, went downstairs, and even got a free upgrade. All in all, the rental was picked up in about 15 minutes.
The car itself (a newer Corolla) was equipped with a touchscreen, backup camera, and Bluetooth. Pairing my phone was easy and I could listen to my music, make calls, and read text messages all hands-free (since using a cell phone while driving in California is illegal -- huge bonus!) Also, it sipped fuel. I drove about 250 miles on the trip and used just over a quarter tank, so refueling was cheap too. The car was equipped with a FasTrak transponder for the two occasions I had to pay tolls, though I only used it once. The price and convenience was reasonable enough.
Returning the rental was also easy. Make sure the tank is filled, pull up to the return agents, get your stuff, they'll take gas and mileage and you can just walk away. Very simple!
Read all the terms and conditions, they don't really push anything on you but you will pay some convenience fees. Not a surprise, just keep that in mind.