This apartment is located in the République Quarter, which is very central (only a couple of minutes away from the metro station) and really well connected (République metro station is one of the best connected in Paris). The neighbourhood feels very homy. It's an authentic Parisian quarter, yet not crammed with tourists, like most of the city center.
The apartment is very well-organised, with all you would need in terms of utilities. It is also a very quiet place because the windows are interior.
Overall, an awesome place!