I came to Antwerp for a conference with some colleagues and we stayed in Petra's apartment. We managed to do everything by foot. Supermarkets and shopping streets are nearby. The flat itself is located in an old building which I find very charming. We liked it a lot.
I also had an excellent communication with Petra. She answers very quickly!
When we visited Antwerp we had some very hot and sunny days, so we opened the windows in the night. It' can be very noisy outside, because there are lots of bars around. So, if you don't want to wake up early in the morning hearing beer barrels on the ground - you better have some earplugs with you.