I absolutely LOVE this place. This is a no-brainer. It's a dream location with views of Plaza Mayor from your very own rooftop terrace. The decor and all of the touches are truly magical. I spent a week there and was still discovering new little nooks and crannies that I did not see before. On top of it all, the owners truly went out of their way to accommodate me very last-minute, ultimately checking me in within an hour of me booking the place.
I can't say enough good things about this place. I will be staying here next time I'm in Madrid and will recommend the same to my friends.
The only thing you should be aware of is that the climbing of the stairs can become a bit much, but hey - it's good exercise!