Claude welcomed us personally upon arrival and gave us the information about the studio as well as nearby shops and restaurants. She was very responsive and helpful in answering all my questions and with things such as how to reach the apartment from the airport. The place is very well located and it looks exactly as it is in the pictures.
It was one issue though: on the last day we agreed on that we (I was traveling with my parents) can leave our belonging in the studio and come back for them the same day before leaving for the ariport. Since we were going to have a long layover, I did prepare some travel snacks and fruits and left it in the fridge. Not only I mentioned that to Claude earlier on the phone, but I also put a note on it saying "Please do not throw away". It had been gone when we got back!
Of course the problem is not the snacks per se, mistakes and misunderstandings happen all the time and particularly in this case, it was really nothing of concerns. But since I put a note on it, I was curious to see what had happened. What bothers me is Claude's attitude towards different issues, in this case saying things such as:
"I didn't even imagine anyone taking a package of food into a plane. Sorry to deprived you and parents of a snack."

All in all, we had a nice stay in Paris, and I still hope that this has been just a problem of miscommunication, rather than being about attitude and consideration.