Really good location in the centre of Madrid & great communication from the hosts.
Shower was hot & powerful but you might struggle to fit in it if you are a bigger person & although a sofa bed it was comfortable.
One downside is the drains outside the door smells bad & unless you keep the windows open all the time the smell does seep into the room, probably shouldn't be a problem unless it's really cold or they are removing graffiti in the square which unfortunately happened to us while we stayed there, they use a really strong chemical so we had to close the window, then the smell of the drains got really bad. Otherwise very reasonable for a short stay.