Sofia's place was absolutely perfect! I traveled with my mom for 4 days.
We were able to meet up with Moha, Sofia's husband, to get the keys and get a quick tour of everything. The building is secured by a code and key fob. The apartment is exactly like the photos--clean and comfortable. It was just the right amount of space for my mom and I. During the day, we folded away the sofa bed to have a bit more walking room.
The apartment itself is steps away from the Tuilieries metro stop, and a 3 minute walk to the Louvre. We found many cafes and restaurants in the area.
Sofia was very quick to respond throughout the stay. We realized the night before we were leaving that our flight left too early for us to use the metro/RER to get to the airport. Sofia graciously offered to call a private driver to pick us up in the morning. Unfortunately, I did not see the message until later at night, but I was very grateful for her sincerity and helpfulnes!
The only negative (and this is completely out of Sofia and Moha's control) was that our neighbors were extremely loud at late hours in the evenings. Every night they would return after midnight and would loudly laugh, talk, and scream for about an hour before quieting down.
Overall, Sofia's place is a great choice for being centrally located and well-priced! Should I return to Paris, I would absolutely stay here again!