This is a perfect location in the Place Monge. Just across the street from the Metro line #7, and the #10 line is a few short blocks away. And, like most of Paris, very walkable and very safe. Also, on certain days of the week, there is a farmer's market in the plaza literally just outside the front door. With all the activity on the street I was surprised how quiet the unit is.
The apartment is quite spacious. The kitchen is suitable for preparing meals with most everything you'll need. The washer/dryer saved us from making a trip to the laundromat. After a day of walking it was great to come back to a hot shower. The bed is also quite comfortable.
Our host, Cedric, was very responsive to all our communications, usually within the hour. At the last minute we opted to stay an additional night. Cedric accommodated us without hesitation.
We definitely recommend for your Paris stay!