I came to Antwerp for a six-week business stay and I wanted something close to the office, and this was perfect. Though it's not downtown Antwerp, it is a nice neighbourhood with everything within walking distance. The city brewery (deKoninck) is only 18 minutes walk away and it has a decent bar. Shops are all nearby too.
Two trams get into town in about 15 minutes, and the tram stop is right outside the flat. You can dump your car on the surrounding streets, possibly even opposite the residence, and use public transport to get around.
The studio is bigger than I expected, about 45 m2, with a small balcony that two people can sit out on. It is basic but complete - it lacked a coffee machine but Ann brought me one on my second day, such is her attention to her guests. There is a microwave but no oven, and a good halogen stove and standard equipment. Nice big fridge-freezer.
Ann is most accommodating - I made only two or three small requests and she came over and dealt with them.
Therefore, I can happily recommend Ann's studio, short or long term, and I would certainly stay there again if I needed to stay in Antwerp again.