I've used The Parking Spot on Haynes Rd for many years, taking the valet option. The prices fluctuate with demand, but a recent booking for me with valet and all taxes and fees was $39/day + tips. If you sign up for their frequent user program and book ahead of time, there's no reservation fee, and there are multiple available discounts, for me a corporate and a AAA discount. Most times the buses are prompt,. I call them as I'm coming down the escalator to baggage claim (assuming carry-on only), head outside, and the bus is either there or arrives within 10 minutes. I get dropped off at my car, which is running and warmed up. I've had a couple snags over the years, including once when they left the windows open in a snowstorm and I arrived to find a couple inches of snow in my car. Definitely an outlier, as happy with the service nearly every other time. I'm Platinum in their program and get a reasonable number of free days.

And as has been said before, I don't have to play the "will I return to A or C" guessing game when choosing short term parking.