This is a nice 2 bedroom apartment on a fairly quiet side street in Vienna. The building is a 10-15 minute walk from the primary tourist areas.
The unit is up two flights of stairs, and there is no elevator, so consider this when booking. Once inside the unit has a full kitchen, two and a half bathrooms and two very roomy bedroom suites. None of the bathrooms are connected to bedrooms. However, both bedrooms are quite spacious, and each includes a sitting table and couch.
I would probably not hang out in the common areas of the apartment, as they are functional, but not subject to any natural light. The bedrooms both have great windows. There is no true living room. The bedrooms would serve as a living area, however, due to their size and furnishing.
At night, the stairwells are unlit, unless you can find the light switch, which can be a little difficult. Nonetheless, the building is in a good area, is safe, well maintained and reasonably well appointed. The unit was well heated and comfortable, which was relevant given that it was below freezing during my visit.
As an aside, the hosts are very communicative, and allowed me to leave my bags in advance of checkin, which was super useful. Saved me having to drag my checked luggage around Vienna while I waited :)
A good stay in a very nice city.