It's a great location! Very close to chatelet les Halles, a very huge metro and train station with many lines. The train from the airport runs directly to chatelet, and you walk about 3-5 min and you reach the apartment.
It is a walking distance to Notre dame and also close to the louvre ( the train there is just 1-2 stops away). As it is pretty central, getting around to major tourist sites is very easy.
Below, there are many shops, cafes, bistros so it's very convenient for food. Only downside is that the noise from the shops and cafe below may be slightly noisy for a light sleeper. We didn't mind it as usually we are very tired from being out the whole day and can sleep through it.
Apartment is spacious, especially the living room and dining area. Can possibly take 4 adults very comfortably. What you Ee on the pictures are accurate. It's a functional apartment, nothing too fancy, but definitely good, practical and sufficient.
Just to note that though there is an elevator, the apartment is located on the first floor (which is actually the floor above the bottom most floor), you will need to get your luggage up a short flight of steps. As the elevator does not stop at the level of the apartment.