The apartment is very well located just around the corner from Tribunal metro stop. The area has a real buzz to it, especially on halloween, with plenty of good quality and reasonably priced places to eat. We'd recommend the little restaurant bar El Salton just off Calle de Fuencarral on Calle de Colon. A friendly informal place with two courses for 9 Euro including entres, wine and coffee.
The apartment we were in had a large, comfortable master bedroom. The other bedroom had a comfortable bed (the main thing) but only room for one bedside drawer set, no easy chair and no mirror anywhere in the room. This room had no air con either which would be a downer in the Madrid summer heat. If staying with children the room would probably be adequate, less so for an adult couple. Otherwise the apartment was very well equipped, clean and comfortable. We would be happy to return there at this time of year and recommend to others.
Joan Carlos checked us in late in the evening. He was great - charming and well informed using a street map to point out good places to go, of which there are many in Madrid.
Would recommend the hop on hop off bus for one day - good Metro system though busy and packed out night and day in the city centre.
Sadly pickpockets are rife in Madrid with loads of opportunity for them around multitude of street entertainers and on the Metro. We had our camera nicked in Plaza Mayor. The police were helpful and very well set up to deal with tourist 'victims' like us and several others that evening in the police station on Leganitos. Met a girl from Honduras who had had her i phone stolen by children in Starbucks and a family from Egypt had a purse taken from a back pack with important documents in. A fascinating couple of hours in the police station but a part of Madrid we could have done without. Travellers really are at great risk from this sort of crime even when you think you are wise to it and vigilant. Apartment concierge a great help getting us sorted out with the police.
Loved Madrid obviously very Spanish, English often not spoken but that's fine with us. Would recommend Botin 'the oldest restaurant in the world' though expensive for the privilege and the Crystal Palace in Retiro park.