What a find. Antoine has a premier location next to the Grand Place. Easy access to everything.
The apartment has two levels with the living room, master bath and single room downstairs a d the kitchen and two queen rooms ( one with small en suite bathroom) upstairs. Yes, the stairs are narrow.
Internet works very well. Heating was fine. Outside noise is nonexistent. Elevator is typically small, but fine. 5 of us had plenty of room.
I highly recommend it.