My cousin and I spent two nights at Youssef. The apartment is just a few minutes away from Bruxelles-Midi - you can easily walk. Youssef welcomed us very friendly and showed us the rooms. He also told us about some sights and restaurants.
The room is very big and the bed is comfortable!
To get in the city tram/metro are very close to the accommodation. If you want to walk, you will be within a few minutes in the center.
I can recommand Youssef to everyone!