Yes, I know you don’t expect to see "car rental" and "quality" in the same sentence. They’re typically not much different than airlines, where you’re just a nuciance they have to deal with to get revenues.
Well this one is different (sorry for sounding like an advertiser, but they really are different): Silvercar
As of today they’re in 8 major cities, and I expect they’ll continue to grow. They only have 1 type of vehicle … an Audi A4. And one color … silver.
So you know what you’re going to get, every time. And it has GPS and Sirrus XM at no extra cost. Nice car that is large enough, powerful enough, and with a good suspension system.
They have both iPhone and Android apps, and you simply scan a QR code and drive away.