The flat itself is ok , but you wont be able to sleep:
it is adjacent to 2 extremely busy roads, with constant traffic from 5h onward. + being in the party zone, expect noise until 4h . (->u can sleep from 4 to 5 :)
It is nice to be in center madrid, but not when your room is directly connected to busy roads. (a lot of other flats are centric but have bedroom in the backyard, so u don't have the noise issue.
+ the only window in appartment cannot be opened (so far?) thus the flat is poorly ventilated.
it didnt really work for me, sorry