Tremendous location 10 minute walk from Plaza Mayor. If you arrive by train from Atocha, take a taxi to the doorstep, it should cost no more than €8. There are lots of Metro stations nearby. The neighbourhood is full of great cafes, restaurants and markets. There's a Carrefour Express not even 2 minute walk away for quick groceries.
Eva uses a remote entry app which may take a bit of getting used to, and you have to download the app, but it's all fine. She will walk you through it. Once you're checked in you can use a regular key if you wish.
The apartment is large and very clean, and the loft is a fun touch (great for kids), although watch your head! The apartment is very modern with lots of wood design and beams. Wifi is strong and the building is quiet.
Yes there is not very much natural light. You can open the bedroom windows for some air. This was a great home for 3 days for us in Madrid. Gracias