Goldcar car rental agency at Madrid Airport in Spain offers a wide range of economic cars and excellent customer service. Renting a car is easy and quick with the online reservation on their website or App, providing the best available offers. However, picking up and dropping off the car has been reported to be a bit challenging, and some customers have experienced delays or issues with the Key n Go service. Moreover, there have been complaints about the policy of assigning vehicles, which can lead to waiting times or additional costs for upgrades. The staff can be helpful, but some customers have reported aggressive up-selling of extra insurance or additional fees for damages. Overall, Goldcar has potential but needs to improve in certain areas to meet customer expectations. One of the main issues is the unclear policy on fees and insurance, which can lead to unexpected costs for customers. Another concern is the potential for delays or problems with the Key n Go service, which can be frustrating for travelers. While Goldcar has a convenient online reservation system, it's essential to be aware of these potential issues to avoid any surprises during your rental experience. With some improvements in customer service and policy clarity, Goldcar could become a more reliable and customer-friendly car rental agency.