We stayed for one week and Lucia's apartment was perfect for our type of holiday where we wanted to have the vibrant life of Malaga such as the beach in walking distance.
As every other guest of her, I also have to say: she is the most helpful host you can think of. She left recommendations for good restaurants etc. in the flat and when we told her we wanted to rent a car to see the surroundings of Malaga, she gave us tips on everything we could ask for (destinations, place to rent a car, free parking lots etc.)
I recommend this apartment for young couples who want to be in the middle of the city and don't get bothered by the noises of some bars in front of the street (it didn't bother us for the week, since we were always quite tired but note that you cannot sleep with open windows. She provided ear plugs which we didn't even had to use and the AC is working really good)
All in all perfect base for a week in Malaga!