The apartment is very, very barebones. Just a bed, couch and a rack to hang clothes on. Everything is relatively new and clean, so no complaints - it's exactly as it is in the pictures ... just don't expect anything more than the absolute neccessities. This is clearly an apartment only for Airbnb purposes and not a single cent extra was spent decorating, etc.
My negative feedback would be about the condition of the building that apartment is in. Unfortunately this is one of the poorest maintained "Altbau" I have ever seen in Vienna. The neighborhood is perfectly fine and safe, but the building feels like it's halfway to a ruin ... dirty, in very poor condition (compared to similar buildings in Vienna), trash in the hallways and going in and out of the apartment to the street was not a pleasant experience.