Thanks Gildas, we really enjoyed our stay - felt a bit Parisian for a weekend.
-Prompt communication/information ( even though we were bit later then expected because of traffic jam ).
-Appartment on 4th floor - 1 bedroom + one comfortable coach.
-Charming because it dates from the 20ties - as plenty of buildings in the neighbourhood ( wooden floor - elevator fitting 2 persons and some luggage ).
-Well situated in the 15th district in a quiet street - opposite to sports accommodation of University of Paris. Open view from the apartment and view on the Eifel tower ( illuminated at night ).
-Some nice restaurants in neighbourhood ( we tried fex Autour du parc 397 rue de Vaugirard ). Plenty of suggestions provided by Gildas.
-Perfect place to discover Paris. Metro on 5 min. (trip to Montmartre in less then 30 min. - to centre takes some 15 min.).
-Nice in Paris: bicycle ride, discoverwalks.com (guided walks in English in various parts in Paris with native Parisian ), etc.