We (me, my wife and 2 little kids) stayed here for 3 nights in summer. Some remarks for FAMILIES: the apartment is essentially in a hostel, so if you want a more relaxed place with kids this is probably not for you. Although the apartment on the 3rd floor was much better. The nice thing about the place is that there is parking right outside and an elevator, so taking strollers, cots, etc. to the apartment is not a big issue.
I would recommend this place to groups or couples and to families who don’t mind the hostel vibe. The apartment themselves were quite nice, clean, and Elisabeth was very responsive and flexible with check in/out. The location is also great with tram lines very close by.