Some sites do not require any deposit payment to reserve a vehicle. Do not risk running out of car! Your booking is only guaranteed making payment of a deposit or sign...
The comprehensive insurance, technically CDW (Collision Damage Weaiver) is a very common type of insurance for car rental that limits the renter's responsibility for damage to the vehicle, but at the same time gives the rental company the assurance that the user will take care of the car...
Collecting your car at the airport desks does not mean you'll complete before the proceedings. The simultaneous arrival of different flights and the low number of firms in the airport makes them look saturated. So hiring with a local comapny is an option also quickly and convenient.