I don’t rent cars nearly as often as I used to given the ubiquity of Uber and Lyft. However I really like Silvercar and wish they were in more cities, and really like Silvercar discounts even more.
Silvercar has an all-Audi fleet (and they’re now owned by Audi) and their all-inclusive model comes with free GPS, wifi, and satellite radio. You pay only actual tolls (no administrative charges) and can pay a flat $5 and they’ll refuel your car at market rate.