I spent a week with Isabelle's appartment and I rate it worth of the spent money.
First of all Isabelle is such a nice person and host. From the very beginning she reacted on every message very fast, even if I was planning the trip in a long advance, and gave me all the necessary details about the reservation, the appartment, its location and equipment. When I arrived she was waiting form me as we agreed, showed me the flat and explained in details how everything works. She gave me also some details about the city and the public transport, checked for me some extra connections and offered me to order a taxi the day of leaving home. I was allowed to use also coffe machine capsules and eat the food which Isabelle got for me arriving late at night (she bought me some bread and a welcome botte of wine, she brought some fruits from her friend's garden) which was super nice.
The appartment was clean and well equipped, exactly as described, located not very far from the city center, well communicated with the centre district of the city, quiet. It is a place to get some rest but to have a quick visit in the city as well. As far as I noticed the district was safe.
Brief: I am very satisfied and I definitely will come back.