I can't say enough good things about my stay here.
Location: perfect! Close to everything (the metro, the museums, El Retiro park, shops, restaurants, bars, Plaza Mayor, Palacio Real). I was able to go most places on foot. I felt safe walking around by myself at night. The street was very well lit.
The apartment: great! It had a lot of natural light, very clean, spacious, comfortable, it had everything I needed for a 5 week stay. Very comfortable bed. Great water pressure. Good kitchen, with top quality appliances. Lots of extra special touches, including a great bottle of wine to welcome me. Plenty of storage space in the kitchen, bathroom, and bedroom. Balcony doors do a great job of sound-proofing street noise. Quiet building, no problem with noisy neighbors.
The hosts: wonderful people. Lourdes, Roque and Luke are friendly, attentive, kind, professional. They went out of their way to make me feel at home. Communication was excellent. They immediately responded to any questions or doubts I had. I will definitely stay with them again next time I'm in Madrid.