This apartment is a great place to stay at for visiting tourists.
The place itself is small (which is not unusual considering the city) yet comfortable, but its placement is the best feature: you are near a lot of metro stations, main museums are easily reachable on foot if you don’t mind walking a bit and nearby you have a vast array of places where to eat delicious food.
I didn’t meet Marine in person, but she has been a kind and thoughtful host to us.
Overall I think it is a good place to stay at for 1 or 2 people (that don’t mind sharing) who wish to explore the center of Paris.