Lavapiès is a nicely mixed district of Madrid, full of ressources and accessible by foot from Atocha - very convenient. Precise and clear informations - all in digital, no printed informations in the flat itself !
The flat itself offers, as far as I was concerned, a very good bed and access to share bathroom and kitchen.
To me, very convenient for a night stop over from Portugal more than for a cosy few days stay - especially in winter as I could not get the heater to work (reversed AC).