We stayed for 5nights. The apartment is a few minutes from Anvers station and easy to find. The apartment is well equipped with a super comfortable bed, good heating and a shower with hot water at all times. The kitchen had coffee, as well as some items for easy cooking. There were 2 carrefour stores around from where we used to buy bread, milk etc for breakfast. We never met Yann but the entire process was smooth. He also allowed us an early check-in as well as a late check-out.
The only negative aspect is that the apartment is on the 4th floor with a spiral staircase making it very difficult to carry our big luggage up.