We had great communication with Chantal - she answers very quickly. The flat was as described and in the pictures. We really liked the decor and the rooms were fine for the 5 of us. The neighborhood is great - lots of restaurants and nice shops. There is a little walk to the nearest metro, but since the streets are so nice, we didn't care.
We had a small problem with a mouse we saw in the flat, but we called the agency, that handles the flat and the came the day after and took care of it. We didn't see it again. We also had some occasional smells from the drains in the toilet and the bathroom. This is a basement flat in a building from the 16´th century, so I guess you can expect these kind of things.
All in all, we had a great time in the flat - definitely recommended.