I highly recommend Midori's place. Clean, tidy, well-maintained, spacious, bright, and convenience to get both metro and tram. With metro, you can reach Brussels' city centre within 30mins, considering the metro station is literally a few minutes walk from the place. The bed is big and comfortable that I slept so well during my stay there. Its neighbourhood is calm and lovely, within 10 mins walk and you are either right in a big shopping mall (where you can do your groceries shopping) or otherwise, you will find yourself in a decent green space to go for a walk every morning - if you don't mind walking a bit further, there's a much bigger Woluwe park.
Overall, Midori's place is value for money. I cannot recommend it enough if you are someone like me who would like to stay in somewhere offering a comfortable bed and lovely place to stay while you are busy exploring the vibrant Brussels.