You cannot get a better location for the city centre! 30 sec walk to grand place, 1 min walk to mannekin pis, 10 min walk to brussels centraal which has a direct train to/from the airport that takes only 18 minutes and costs around €12. close to bars, restaurants and attractions and everything else you could possibly need.
the apartment itself was very light and clean and accommodated the two of us comfortably. great value for money, i would definitely recommend!