Be prepared to have your hubcaps stolen. We rented a car at the Malaga airport, drove to our beach front condo in Fuengirola and went to bed. When we woke up the next morning our hubcaps were missing. When we mentioned it to the concierge, he said, "Of course, they always steal your hubcaps on your first night in Spain. After that they are gone."
Driving was very easy and fun, however, customs returning from Gibraltar to Spain was the longest I have ever experienced. We were very glad that we had lots of water.
During our time in Spain, we would freeze bottles of water each night. This worked out fabulously because they would remain cold throughout the day. We also bought a small styrofoam cooler which we kept in the car.