Communication was overall good but when we arrived the provided code for the lockbox did not work. It took around 20 minutes to get a reply and when calling the phone number nobody picked up which was very frustrating as we had a long journey. It turned out they recently changed the code for the lockbox and they provided the new code after around 20 minutes.
The location is not in the best area of Brussels but the house & entrance itself is modern and tidy.
The apartment itself was very nice and modern, after the hassle with the wrong code we enjoyed our stay here.