This is a fantastic place to stay for four people who don't mind sharing a space. We had our two daughters upstairs on the mezzanine level (I wouldn't recommend this for very young children due to the stairs), the location and decoration and really everything about it suited us perfectly. It was light and clean, and special to be in an old building with lovely views of the nearby church from the roof.
We spent three nights and were very comfortable and we loved Antwerp.