We loved our stay at Isabel's apartment, which was exactly as advertised. It's within easy reach of metro stations and a fairly short walk to the city centre. Isabel was very prompt in responding to messages and was very flexible with the check in time. The only minor issue we had was with noises coming from the street/other nearby apartments very late at night and which continued for a few hours. Perhaps this was because it was the weekend so I don't know if the experience would have been different if we stayed during the week. All in all, we had a very pleasant stay and would recommend this apartment to anyone visiting Madrid. The sofa also turns into a bed so the apartment can easily accommodate two couples.