Very nice appartment, exactly as described. I was there in februari and the place was cosy and warm with heated floors in parts of the appartment. Communication was easy going as was the key pick up.
I must admit I was just a bit weary because of some of the reviews but in my stay everything was perfect. I've been in Antwerp multiple times and find that this side of the old town is a very good part to stay in. If there is one thing it would be that you'd have to be lucky with your upstairs neighbours I guess, it can be a bit noisy - or at least my Italian neighbours were. That said, I'd recommend the place to anyone and will be staying here again myself.