We stayed here for a week with our son (12yo). Communication with Antonio was great and the space looks like the pictures. It is in a great location, steps away from the main via, shops, restaurants, and theatres. The restaurant public downstairs was lovely.
I only had two things I didn’t like about the space, but they are personal. I found the space to be small, especially the kitchen. We could only have one of us in it at a time cooking. The bedrooms however are good sized and beds comfortable. The other was the noise. Because it’s right downtown, it is busy and you can hear everything, especially between 9:00pm -3:00am.
If you are going to Madrid for the action, then it’s a great central location. If you are a light sleeper, this might not be the place for you.