The key is a TINY bit confusing, but I'm bad with keys, haha.
This location is great (-20/30 minutes outside the city by bus which is frequent and easy to pay via contactless method). Jens and Joanna are very nice, you have free access to the kitchen and my check in and out was incredibly easy. They have reasonable restrictions on not showering and cooking between midnight and 6am.
Just a warning, there's a lot of construction within Brussels, so often, a bus stop would not be where I was expecting-- which I was warned of, but can slightly delay your journey.