Great apartment in a perfect location. Close to the metro, and within easy walking distance of the palace, and even the Prado. The apartment was very clean, with nice touches like soaps and basic condiments. It also had an espresso machine (bonus!) which takes pods (not K cups), as well as a regular drip coffeemaker (which we didn't use). The kitchen was thoughtfully kitted out enough so that we could make simple meals. While the street can be noisy, it was well insulated and the noise was hardly noticeable inside. The building is very quiet. The sofa bed was comfortable for a young adult. And the air conditioning was wonderful in July!
We were even able to leave our bags at the management's office so that we could start exploring Madrid right away. A great first Airbnb experience!