The apartment was very cosy. We felt very good there and we spent a good time in Belgium. The distribution of the house in 2 floors is very nice. After unlocking the front door at the street level, you have to go up through 4 flights of steps to get to the apartment. The apartment itself has no lock: the only key you have is the one for the front door downstairs. The hosts live downstairs in the very house, so there is no problem of safety there.
The hosts were very helpful with our late arrival and late departure, allowing us to leave our luggage in the house after check-out, to come back for them before going to the airport. They answered quickly to our questions and made no problem of any issue.