Super compact studio = no couch/seat other than bed. No oven, yes micro and full size fridge. Super small bathroom with great mirror light. Exterior shutters provide for blackout lighting at night. Yes TV and great internet connection. Best for 1 person, imo.
The neighborhood is very central: 10 min walk to Atocha train station, same to Retiro park, 15-20 min to Gran Via and Plaza Mayor, 15 min to the river. Bus station on the corner. 24hr open supermarket within 2 short blocks, others 1 block away. Tons of restaurants. Quiet at night despite ‘in town’ location (with exception of 11pm garbage pickups).
Great welcome by niece who told me tons of things. Eloisa responsive to questions etc. Apartment specifically designated for tourists so no ‘be quiet and don’t say anything’ - ID has to be presented.

This was a great base for exploring Madrid while living in a slice of it instead of a bland hotel. Would absolutely consider returning.