From Boston to Acadia National Park in Maine, then Portland, back to Boston, and finally New Haven,

The staff was friendly, and the car return was convenient.

I rented a car at Boston Airport. After getting off the plane, you can take shuttle bus 33 or 55 for two stops to reach the car rental center. Very convenient. The Hertz signage is big and noticeable, and the staff was very friendly. There was no line, and the process was quick. They initially offered me additional insurance, but after I told them I already purchased full insurance from QEEQ, they didn't insist.

Acceptable

Great service

Like: Picking up the car is very easy as a shuttle takes you right to the car rental area and once there, you are are your way within minutes. When dropping off the vehicle, Hertz staff were very friendly, addressed me by-name and helped me get to the return shuttle.
Dislike: What wasn't so pleasant was when I went to get the car I reserved, it wasn't available. I did get a comparable-sized vehicle, but I'd chosen one specifically for cargo space and vehicle familiarity and I wanted to feel comfortable in a car I'd driven before. Getting the car to Logan's drop-off point was straight-forward, after all the nail-biting I did to find my way through Boston!