We spent a week-end in Antwerp at Dries' place and it went super well. Dries' place is warm, cosy and comfortable. It's actually even nicer than on the pics.
We were three and the extra bed was comfortable. We had everything we needed for a weekend and even more. It is not in the center but Antwerp can be explored almost entirely by foot. Otherwise there's a tram very close to the flat to get to the center. I highly recommend this flat and would be happy to go back.