I don't rent cars much but used SilverCar out of SFO in 2019. I thought the service was great and really enjoyed the car (A4). I've owned Audi's before and liked being able to rent one that didn't cost an arm and a leg.

It's too bad they are shutting down the airport locations - I understand but renting a car through a dealership is always a more difficult process. You have to get to the dealership, then find the right salesperson who handles the rentals (who is invariable off that day, or doing a deal, or at lunch). In the end, just not as simple as a dedicated rental location.