This flat is awesome!
It's tiny but cozy and super quiet. The metro is around the corner, awesome restaurants on the other side of the street, tons of shops. You can reach most parts of Paris within 20-30 minutes easily!
Just be aware that you'll hear the bass and vibration of the metro as in most places of Paris.
Plus, be aware that this is a one room apartment.
I highly recommend this flat and would book it again.