My time is worth something when on vacation. Rental cars are commodities and the only way these no name places charge less is by cutting corners somewhere. I would expect they have less staff, little/no 'customer service' people, longer lines, off site rental locations, run-down/poorly maintained vehicles and may not operate 24 hrs. Then they try to strong arm you in paying extra for things like 'insurance' you don't need. I will stick with known/established rental companies who have locations at the airport.