The flat is like on the pictures and corresponds to the description. It's very well located and very calm, so at night I had a very good sleep. The kitchen is well equipped, internet worked perfectly and the check-in was easy and flexible. Even for check-out Marc allowed me to stay a bit longer as my train left a bit later.
There are only a few negative points: It was impossible to open the window in the sleeping room which made it impossible to make enter fresh air, which was a real pity. In rare occasions I felt a bad smell from the bath room (probably from the sewage pipes, but really no big deal and not all the time) and the air conditionning in the sleeping room did not heat at all (the one in the living room did so though!) which made it a bit cold - there was a mobile heater, but very little space for it, so it would have been nicer to heat with the air conditionning.
Still, all in all it was a very good experience and I recommend this flat.