Not sure if you should book this apartment for your stay in Madrid? Book it, trust me, it's amazing. My family and me (group of 6 people) loved everything about it. The apartment was spotless and check-in was easy (Carmina, the lady who takes care of the apartment, waited for us at the apartment). But what's best about the apartment is its location: Plaza Mayor, Puerta del Sol, the Mercado, ... everything in walking distance! We hardly took the Metro and basically walked everywhere. Tapas restaurants, supermarket and beautiful sights just around the corner. We'll definitely come back one day!