I think you cannot do anything wrong about choosing to stay at Luca's place. Even though Lucas was not able to be there during our stay, we were always in contact via mail - he replied very fast to our questions and gave us good advice on how to get to his place. His house is located in a vivid quarter with plenty of takeaways and small restaurants. To get to the city centre you either take the metro, which is just around the corner, or take a 15 minutes walk.
Our room was just as shown in the pictures - clean and cosy. I would definitely recommend Luca to anyone who wants to pay a visit to the lovely city of Brussels.