The apartment is clean, bright, and spacious, the photos don't do it justice. We were three single adult travelers, so the setup worked well for us - one in the bedroom, two in the twin beds in the living room (living room has doors, so there's potential for a bit of privacy, or at least noise reduction). The kitchen is big, and has all the basic necessities for simple cooking. The neighborhood is great (lots of good restaurants and shops) and it's just a reasonable walk or a quick tram ride into the city center (there are stops for two tram lines right outside, and an S-bahn station less than a mile away) but if you want a quiet night in, that's definitely possible.
We had a couple technological issues (WiFi troubles at the start, then an issue with the DVD player later on) but Duc Son lives in the building, responds quickly to any messages, and went above and beyond to try and help us.