Consuelo and Alberto are great hosts and very friendly! Very nice people to meet and talk to. The apartment is very nice and well taken care with a very interesting view. The location is exceptional, right in the middle of the city and could not be better for someone trying to see the touristic attractions in Madrid. Even though the apartment is very central it was still relatively quiet during the night which is a plus. Great restaurants and tapas at very short walking distances.
The only potential issue is that it has five flights of stairs to get to the apartment which was not an issue for me but it might be a problem for senior tourists.
For me everything was perfect and I will certainly try to stay with them in my next visit to Madrid.