The apartment was great and clean and very well located few steps away from Puerta Del Sol square which is in the heart of Madrid and gives access to many places by walking and also great transportation options including 3 Metro lines, buses and train station.
The Check-in process was very smooth and quick, the apartment had many facilities and all what we needed and more, and the communication with the Host (Miguel) was perfect.
The only point to note (which was not an issue for us as we were one big family), that the apartment has 4 bedrooms, but 2 of the bedrooms are not totally closed, the one with the accordion wall is only accessible from the accordion (which means the wall is not totally closed) or through a door from the other bedroom, And the bedroom that has the 2 bunk beds doesn't have a door and to reach the big bedroom inside you have to pass through it.