Location is excellent, right in the center of Madrid and close to some great local restaurants and shops. Apt was very clean and it felt safe too. Responses from Daniel were very prompt.
I gave it a 4 star because the place was very warm when we arrived and it took about a full day for the temperature to drop to a comfortable level. The other reason was that it was very noisy outside at night time when we were trying to sleep. I definitely would recommend that place but make sure you contact the host to lower the air conditioning a day before you arrive.