A great apartment in the perfect location for travellers wanting to be in the heart of the city. We would definitely stay here again the next time we come to Brussels.
The apartment itself is lovely - modern but cosy, and very clean. As others have said, there was a little noise from outside at times, but you can't really expect not to have that with an apartment so centrally located. 
John and Ceca were super helpful, providing really detailed instructions for checking in/ checking out/ directions from the station, etc. They also provided some great recommendations for local restaurants, cafes and bars that we definitely made use of.
I would highly recommend this apartment - a great place to stay for a long weekend!