The stay in Björn's house was great. We were traveling with 7 people and everyone had enough space. Also, the bathroom was big enough to get ready with several persons at the same time. The equipment and the design were also very pretty.
The location was also nice, a large, attractive park is just around the corner and ample parking is also available. By foot you can reach the city centre withing ca. 30min.
The only "deficiency" was the noise at night caused by the train line and the church clock, but who has a deep sleep, should not be disturbed (otherwise just bring your own earplugs and the problem should be solved).
Antwerp is definitely worth a visit and we can only recommend Bjorn's house. :)