We would certainly highly recommend this place to anyone. Almost all good things to say:
The Good:
Excellent location that was just a 5 min walk from just about all the good spots in Brussels. The apartment itself is in a nice building and is very spacious and well equipped. Had a great welcome gift waiting for us and a nice handwritten note. I had good luck w/ the Sweet Inn app and digital key and didn't have any issues. Loved the kitchen, the view, and the bedrooms.
Room for Improvement:
Not much here. Only having 1 toilet in that huge space was a bit weird and if you have more than 4, I think could be an issue. We had a small issue connecting to WiFi on Day 1, but the problem was quickly resolved by Sweet Inn and we had connectivity in the morning. The only other minor nit was that the side tables by the bed weren't nearly big enough, but there was plenty of other space to put stuff so I could let it slide.
Note: One other note is that the address for Google Maps in the Sweet Inn map is slightly incorrect. Use the address they send you in email, not in the app or it will send you down the street and not to the exact address - we had a slight issue with this for our Uber driver, but ended up figuring it out after re-reading the email instead of using the App.
Overall this was a fantastic value in a great location for a fun city. Highly recommended!