The right rental decision at Miami International Airport depends on where the itinerary goes after pickup, not on a generic -best car- label. Start with the airport transfer, then list passengers, luggage, parking needs, road conditions, and any toll or charging questions.
A Miami neighborhood and beach plan should be evaluated around parking and tolls. A Keys day trip or broader South Florida loop adds distance, luggage, weather, and road-condition checks that can justify a different vehicle class.
Compare the agency's current vehicle description and terms with the actual route before booking. Treat rates, authorization holds, hours, inventory, and add-on policies as changeable: verify them with the operator and the relevant airport or transportation authority immediately before travel.