My spouse and I spent a total of 7 nights here. We first spent 5 nights, left for a few days and returned for an additional 3 nights.
The location is excellent--right on the metro and close to Jardin des Plantes which is a very special place. the Jardin is very large with several different gardens. For example, there's an alpine and a wonderful rose garden. When you walk out you're on banks of the Seine. But best of all, it's off the usual tourist track. Thus, you can enjoy the Jardin without the crush of tourists. That's also one of the attractions of the apartment. It's close to the tourist areas via Metro, yet far enough away to feel as you're part of the neighborhood.
The layout of the apartment is lovely. As you walk in there's a living room with windows that open to a balcony. On the left is another room with a fold out bed and another set of windows opening to the balcony. On the right is the kitchen, bathroom and bedroom, all of which have windows. In the morning the sun streams in as you're drinking coffee and eating a croissant. The apartment is on the 6th floor and is serviced by a small elevator that only fits 2 people. While some guests may be put off by the noise from the street and metro, it wasn't a problem for us. We live in a city and know that it is just something you expect. We found a restaurant a couple of blocks away that we enjoyed. As noted by another reviewer, a farmers' market appears on Thursdays right in front of the building.