We stayed two nights at Greets place and enjoyed it a lot. The apartment is actually a whole house on three levels with a sleeping room downstairs and one upstairs and the living room/kitchen on the middle level. As Greet wrote already the stairs a fairly steep but no problem for us. Very nice interior and even some juices and coffee available.
You can park on a secure parking place.
We had our bikes with us and could easily explore the whole inner area of Antwerpe.
We would stay in this place again.