My family (5) and I stayed at Ramon's place for more than a week. If I return to Madrid I would happily stay here again.
Beds were comfortable. Pillows were good. Bathrooms were good. Place was spacious. Location is perfect.
I arrived a bit after hours and had to get the key from a lockbox in a location separate from the apartment. I was worried about this process before we went, but it was smooth (the taxi waited on the street while I retrieved the key; it took about 30-40 seconds to get out of the cab, go to the lockbox, retrieve the key and return). Grocery stores were within walking distance, lots of good restaurants and tapas nearby, lots of churro options nearby.