Our room was in an appartement which is entirely used for renting airbnb-rooms. The room was small and clean, the bed a bed-sofa and thus not very spacious/comfy. I guess the single rooms in the appartment are actually better, as the beds have proper mattresses.
Communication could have been better beforehand, we had some miscommunication about our arrival time (the hosts don't seem to check der phones very often, it's better to contact them via airbnb). But it all worked out well in the end.
Overall: Good quality for price. In a hostel we would probably have paid the same in a big dorm, so it was a really good option for us.