It's a great service and the Malaga airport shuttle service is used by residents as much as visitors to the coast. Expect to see cabin crew or airport workers on the bus with you.
Tell your guests and visitors that Mike says "Malaga Airport starts at Marbella bus station!"
Unless you are picking up your mother-in-law or the grandchildren, meet your guests at the Marbella bus station and drop them back at the bus station kerbside after their holiday!