First Olimpia made us feel very welcome! She was very responsive in every hour of the day (and we got there from the airport at 1am).
The apartment was PERFECT. We couldn't ask for a batter location. We almost didn't use the metro to get to the most popular places. It's in the center between the opera, luver, eifel tower and more. And if you don't like to walk the metro is right on the corner.
The apartment itself had all we needed. Comfort bad,small and useful kitchen and a clean bathroom.
We recommend to stay there without a doubt.
Enjoy