The apartment is on rue Auguste Bartholdi in the 15th Arrondissement. In the Google Map screenshot below, the apartment location is where the red star is marked. Note the proximity of the Dupleix metro station.
At the top of the image you can see the Eiffel Tower and the embarcation point for the various Seine boat tours. The large park is the Champ de Mars.
Flipkey and we will be pleased to introduce ourselves properly and answer any questions you may have on the apartment, neighbourhood, or what to do when you are in Paris.