The place was very very nice (small and cozy).
It is unexpectedly quiet, so you can have a very good sleep and work from home without interruptions.
I arrived a few hours before 3PM (the actual check-in time); Elena was very gentle to let me in. They were still fixing some stuff, but I really appreciate that I had a place where to sit and leave my stuff after a very long flight.
The apartment was super clean and has everything you might need to be comfortable.
If you are an outgoing person, the area is full of restaurants,, bars, coffee shops, etc. and if you feel adventurous, you can walk to the "Parque del Retiro" (20 mins walk)
Thanks a lot to Elena and her team!