We stayed at Melissa's place for 3 nights, and it felt too short. The studio looks great in pictures, but it's even better in real life.
We arrived somewhat late since our train got a bit delayed, and missed our meeting with the manager, but someone from the restaurant let us in. You have to climb a flight of stairs but they're not too small so it shouldn't be much of a problem.
The flat itself is really clean, nicely decorated and we found everything we needed. It was loud outside, but that's already stated on the description and other reviews, and we were prepared for that. Melissa left us some earplugs that helped a lot, so it didn't bother us at all even considering we stayed during a weekend.
Melissa sent me a lot of recommendations on places to eat and helped me confirm how to get to the apartment from the train station, and was understanding of us being late. You have to try the crêpes from her restaurant downstairs! We went as soon as we settled in after arriving, and only wish we could have had more!
There're a lot of places to eat and visit around, and just around the corner you can see Notre Dame already. I can't wait to be back in Paris, and will definitely stay at this place again.