Sofi's place is great.
It was a bit bigger than I was actually expecting (once everybody says places in Paris are usually too small). Sofi's place is a perfect size for two people.
The thing I liked most about it was its location.
It is very close to the Tower Eiffel.
It is also close to supermarket, restaurants, and bus stop. A short walking (less than 10 min) to the metro/RER station.
During my stay, the elevator was under repair. But, that was ok, once her apartment is in the first floor.
I would recommend her place.
Also, I would not hesitate to looking for it again, in my next time in Paris.