Really enjoyed staying here, great, vibrant neighborhood with a grocery store and a metro station about a block away. We walked to the Prado Museum in about 15 minutes and about the same for the Rasto Flea Market (Sundays only). Walking around in the area felt very safe.
The apartment was compact but complete, with the washing machine a bonus since we were traveling for a couple of weeks. The bed was comfy and although the units faces the street, it has high quality doors going out to the twin balconies. We left them open a lot, but closed them at night and they blocked most of the sound from the streets. When we go back to Madrid, we will definitely want to stay here again.