Great apartment in a lovely, quiet, leafy neighbourhood with good transport links into the city centre. The building is staffed 24 hours and the staff are helpful and courteous. Communication with the host was smooth and efficient, and check-in/check-out were easy and hassle-free.
The studio apartment has everything you may need for a short stay (a powerful hairdryer, iron, washing machine, fridge, etc.) and there is ample wardrobe space. The kitchen is well stocked with cutlery, crockery, kitchen appliances and basic cooking ingredients (salt, sugar, spices and even balsamic vinegar), which was very helpful.
At night, it was quiet and, at least during my stay, neighbours seemed respectful as I didn't hear any loud conversations or TVs. The bed was firm and comfortable, and there were numerous pillows to choose from.
The views from the flat are fantastic and there is plenty of natural light. Overall, a great stay in a clean, quiet apartment in a beautiful neighbourhood. I will be coming back when I next visit Madrid. Thanks, Ignacio!