Clean and cozy space in a neighborhood full of places to shop and eat and within walking distance to everything. Professional and responsive hosts. Easy Uber from Atocha. Love the code entry instead of keys. Well equipped kitchen although it would have been nice to have a couple of coffee capsules provided for the morning.
The bed was very comfortable, the sofa bed not so much.
I would absolutely stay there again next time I'm in Madrid.
Be aware there is a bar across the street which is not unusual for Madrid but if you want a quieter stay it looks like there are rooms in the back not facing the street. I would ask for that on my next stay.