Place itself it not great. Shower was not hot, warm at best, and a horrible sewer smell in the bathroom. Kettle wasn't working and we noticed some pans were dirty. There was a rug between bed that was a bit yucky, I would take that off if it can't be kept clean.
Having said that, the location is great!
We went for the Christmas Markets and it's super close, we walked everywhere. Good transport links if you want to go to museums or other stuff. Walking distance to Brussel Central train station which is also a big plus.
We stayed for two nights only so we could look past the issues in the place (we really were out the whole day anyways). If you're planning for a longer stay or stay in the place for more than just sleep, it would choose somewhere else.