Our stay in Valerie's studio was a wonderful experience for our 25th anniversary. The studio is sunny, clean, and really is just like the photos. You wake up to the smell of fresh croissants and the sound of church bells and a bustling marketplace on Rue Mouffetard.
As others have noted, the stairs are very old, dark, narrow and steep with loose tiles. However, once you reach the top and open the door to the studio - light floods in - c'est magnifique! You have all the modern conveniences you might need including a modern shower with lots of hot water.
Valerie is an excellent host. She welcomed us personally and had some great ideas for local activities.
This was our first experience with Airbnb. It was very positive and we would highly recommend this studio for a real Parisian experience.