I had a long stay in Anke's apartment (2 months) and it was perfect! Her apartment is suitable for 2 people and has everything you need for cooking or bathing. It's located in a quiet and nice neighbourhood not so close to the centre but still reachable in 10 minutes by bike.
Shops, laundry and also a train station are nearby.
Communication with Anke was really easy, both for the check-in and check-out. When there was any kind of problem she was always ready to help.
So I definitely recommend this apartment, also for people who want to spend a long time in Antwerp!