Zipcar Sucks and So Does App World
freddiedeboer.substack.comZipcar was acquired by Avis back in 2013, and the service seems to have been in maintenance mode since then.
In the SF area, I've been rather fond of Lyft Rentals. But if I'm traveling to other metros, it's back to traditional car rental companies (National, Avis, etc.) to me, at least for now.