Room: Big enough for a double bed, a small tv, and a table for two on the side. The room is adorned with a lot of Livia's travel memorabilia from various countries (mostly oriental). I suggest you bring a small luggage because there is no wardrobe space, so you'll need the rest of the floor space to spread out your luggage.
Bed: Sofa-bed so it can be a bit squeaky. I try not to move too much so as not to disturb the neighbour. Walls are thin so I can also hear some of the movements coming from next door.
Toilet and shower: Small, but it wasn't a problem for me (5'7" and 56 kgs). A big person might have a bit of a problem though. Toilet paper, hand soap, towels, and floor mats are provided, but bring your own toiletries.
Kitchen: The flat has a gas stove with exhaust fan. Pans, plates, and utensils are provided. There's a grocery (franprix) about 3 mins away where you can buy your own ingredients. Livia has left me butter and jam in the fridge, which is very thoughtful of her.
The flat is on the 3rd floor from ground level. Neighbourhood seems okay with lots of restaurants and shops nearby. 5 mins away from Victor Hugo metro station (line 2) and 3 mins away from Boissiere (line 6). I recommend you try the Italian resto called Romeo just across the road from Victor Hugo station. I honestly think it's one of the best restos I've ever been.