I have had good experiences renting on business trips with Turo itself. I wanted more exotic cars than what I might get at Hertz so created an account and all that. It's true the price goes up substantially from the originally stated rate though, maybe I didn't quite see the discrepancy because I had already created an account.
My biggest gripe with Turo, and the reason I don't use it much, is it's really inconvenient, even though you book through the app. For example, I land at SFO. With Turo turns out to get the stated rate you need to go to the car's location, which ime is usually some inconvenient neighborhood where the owner lives. SO it's kind of weird Lyfting to some neighborhood to get a car. Otherwise it's like an extra $80-150 to have the car waiting at SFO (or whatever airport). Then returning is the same ordeal.
I am a bit used to the dark pattern in the app they and places like AirBnB employ, for better or worse I'm used to it, and so never really get my hopes up until I see the final checkout price right before hitting "Reserve" (which adds friction because the fees are never the same across cars/homes). One thing that I think would make Turo viable for business travelers like me in the future would be a much more frictionless delivery process, perhaps acquiring a rental area at airports like the regular car rental companies have and not adding giant fees to avoid inconvenience. Put the onus on the person providing the car to have the car at the expected place at the expected time.