Location of the apartment is in Montparnasse, 25 minute walk from the Eiffel Tower. Other major Paris attractions are no more than 30 minutes by the metro. The metro is only 5 minutes walk from the apartment. We liked this because it wasn't busy like other parts of Paris, but close to the metro that allowed us to reach major sites quickly.
It's in a quiet neighborhood that has a lot of character. There are also many great cafes, restaurants, bakeries and grocery stores within walking distance (5 minutes).
The apartment is clean and good size for 4 adults. However, if you have active young children, I would suggestion not staying here since there are lot of things that are breakable.
Beds were very comfortable, which allowed for a great nights rest. Many of the other apartments in the building seemed to be rented out by same host and we ran into many other Americans here.
Host is very responsive and helpful when we had questions or requests.