Albrechts And Debora's place is exceptional, and i recommend it to everybody travelling to Brussels for a short holiday.
The room is very spacious, and even though Nr. 3 is in the basement, its very light. The Kitchen is not designed for long-stay, but basic cooking, with focus on breakfast (lots of little things provided, such as waffles, coffee, etc.). The whole place is immaculate, that's a perfect standard. The showers are amazing, brand new, rainforest showerheads, you feel like in a great hotel.
The security set up is very ensuring, a nice gadget to open the front door with an electronic lock.
I brought my bike along (beautiful parks just around the corner), and even though the place wasn't intended to store a bike, the owners found a very suitable solution for me. Overall, excellent communication, enthusiastic, helpful, friendly - a definite recommondation for your next Brussels holiday!