The apartment was noisy, and featured only the bare minimum of essentials. Some things didn't match the relative level of comfort we were expecting, such as the bathroom/toilets being only separated from the bedroom (and the rest of the apartment) with a thin cloth, or the bedroom only featuring a thin and light fabric to shield from the sunlight (which let virtually all the light through early in the morning). This is also not the safest part of town, but a decent location if you arrive at the North Brussels station.
Those things might not be important to other travelers, but I'm pointing them out because to us, they contributed to making this otherwise beautiful place a not-so-great experience, which led us to moving to another place that better matched what we were looking for.
The hosts were otherwise very accommodating when it came to checking in!