Overall we had a pleasant stay.
The apartment is well located (about 10 mins by public transport from the station), it is large (you can easily get there with six people) and the neighborhood was not a problem.
My only criticism would be in the cleanliness of the apartment, there are some traces on the ceiling and/or on the walls. A little paint job wouldn't be a problem.
For the rest, I have no complaints. Communication with Marc was very good and I thank him for his hospitality.