Very nice place. Good access to several metro stations. Supermarket within walking distance that is open 24hrs. Area felt very safe and nice, not crowded. Bed really comfy. Sofa not so comfy (some old springs sticking out). Layout of the flat is really good, small (as expected) but lovely. Some noise every night as far as I can tell just before midnight when the bins were emptied (should not be an issue unless you sleep early - but why would you in Madrid?). Hot water does not last super long - I struggled a bit when washing my hair. Overall very good experience, very good communication!