I thoroughly researched AirBnB for my week in Paris.
Sofia's flat was perfect and did not let me down.
I traveled alone, but could see how her place would work well for a couple too. It is not a huge loft, but it is a good value and just the right size for 1-2 travelers (comfortable and not cramped, and priced fairly).
It really is ideally located, secure, quiet and just as described. The Metro is right around the corner as is Rue Cler which was so great for anything I needed (mostly chocolate croissants).
My arrival and departure were also seamless by Yasmina. Thumbs UP!