Great communication, host delivers super clear infos. Location is superb, next to Gran Via. One metro station 3 mins walking away, another two less than 10 mins walk.
Space is super clean and modern. Did not use kitchen or living room, they looked nice. Since it is a floor with 20+ individual rooms I was afraid it could be noisy, however it was quiet at night.
A/C blows super cold and it is a life saver for Madrid's Summers.
One Tip. Access to the place is through various closed doors/gates at night. You will need codes to open them. Remember to write those down on paper, you never know if your device battery dies/fails. Key is valid for the room itself only.