The house is perfectly located walking distance from all the main sites and in a very cool area. All around you'll find cafes, restaurants and nice shops. The house is large and extremely well decorated and the bedroom is perfect with a nice view of the square and a very comfortable bed. The private shower is just half a flight down the stairs and on the same floor just outside the room you have a toilet.
Both Pieter and Stephen were excellent hosts and gave me lots of very useful tips on places to visit in Antwerp.
I'd definitely recommend staying with them.