Eloisa's place is very nice, clean and well located. Inside quiet district, but still very close to city center: walk or 1-2 stops from nearest metro stations - which are actually very near.
I would highly recommend this apartment to 1-2 people - it will be tight for more than 2 people.
Eloisa's niece met us at designated check-in time and explained everything: inside house, neighbourhood, getting around, places to eat and main sightseeing locations.
If i come to Madrid again, i will definitely stay at this apartment!