The staff was VERY nice and very accommodating. I had rented FIVE rooms for a mini-group tour by nine people. This gave me an opportunity to get feedback from several people.
The rooms are not air conditioned, but we did fine over two weeks with 15 euro fans purchased at the local Cora when the temperatures went to 30C. The hotel did provide fans, but we bought our own before realizing they were available.
The cooking area is small and so there is no conventional oven, but there is a microwave. ALL parties cooked and NONE of us found this to be a problem.
The proximity to the train station is a plus and there are many nearby nice restaurants. The Pompidou Center is a VERY short walk away. Even the cathedral in the heart of the old city is only a 1500 meter walk. Everyone in the group walked between the hotel and this area at least once - and we ranged in age from 25 to 81.
With a two-week rental, we had enough time to discover any problems and other than what I mentioned, there were NONE ... and again, the staff was WONDERFUL!