Guillermo's proxy, Antonio, was very helpful and gave us the run-down on everything we needed to know about the apartment. The apartment was very clean and bright. I don't think you could find a more quiet location in the city. My wife and I absolutely loved the neighborhood as there are loads of fantastic artistic shops and restaurants nearby with very helpful staff and great food. My wife and I are used to a king size bed so the smaller platform bed took a few nights to get used to. Regarding cost, location, Antionio's helpfulness, cleanliness and general comfort, this apartment is an absolute win. We would definitely rent again the next time we are in Madrid.