We had a fantastic stay at Florence's place which is next to the Royal Palace as well as the Magritte museum and above the lovely cocktail bar "La Pharmacie Anglaise" (which I recommend for a drink or two). The accommodation is about a 10-min walk to the city centre and you'll find many cute coffee shops, nice restaurants, and fun bars to go to on the way.
I highly recommend this accommodation if you choose to visit Brussels - it was clean, spacious, and cosy! On top of that, even though I didn't get to meet Florence in person, she was friendly and gave clear check-in/check-out instructions via text.