We had a good time in Silvias appartement. It is located in a quiet area in Madrid - you can rrach everything by Metro or foot in a reasonable time. There are restaurants around and a supermarket. The place was clean and we loved having two bathrooms.
If you are sensitive for noise you should bring your earplugs, as you can hear the Metro traffic and neighbours easily.
It was a great place to stay and to explore Madrid. Silvia was always tgere when we needed something.
Check in and checkout was very flexible!