The room is as shown in the photos, little but very comfortable and clean. Climbing the stairs to reach the shared bathroom is not a big deal but keep it into consideration.
The shared kitchen was perfect for our purposes (a 3-day touristic stay in Brussels), the cleanliness mostly depends on the other guests.
The position is good, city centre and central station Gare du Midi are very close to the apartment.
Only bad note, towels smelled quite bad...
Overall I would recommend it for the price.