Staying at Maria's place was absolutely perfect. You can walk everything and to be in Madrid's gay hot spot, you are definitely right.
Maria gave us great advice and managed our restaurant reservation, which you definitely need if you want to go to the great ones. The apartment itself is gorgeous - lovely furnished and totally quiet.
Maria's husband picked us up from the airport which was super comfy and perfect for a talk about Madrid during the drive.
We will definitely be back.