The apartment is really close to a subway station, making it easy to come and go to anywhere. But it is also so well located within Paris that we only took the subway to go to the Eiffel tower! We walked to the Seine, the Notre-Dame, the Louvre, the Champs-Elysées (although for this one it takes 20-30 min, but it is a very pleasant walk), so the location in my opinion is the best you can ask for.
The neighbourhood is really nice, with a good vibe and many different restaurant options.
The room is very clean, big and cozy. You have all privacy you can ask for, and we heard no noise whatsoever from the streets. Also, I must mention the bed is extremely comfortable! And large also! The bathroom is large and the shower is really good. You also have access to a fully equipped kitchen.
Olivier and Matthiew were very welcoming and nice, and recommended an excellent restaurant nearby! They gave us a city map and helped us when we had any question about the city. Also, Phoebe, the dog, is really sweet. She will play with you if you want it and she behaves very well.
We will definitely stay there again if we can, on future trips to Paris!