Location: location is okay it's close to public transport tram/bus/sub. it's a bit far from city center but public transport is easily accessible so it's no big deal.
Amenities: If you travel in summer be prepared for heat because there is no air conditioning, we were lucky that it was not too hot during our stay or it would be impossible to sleep. The window doesn't close properly in the room, if someone tried to push from outside it will easily open and because its a ground floor someone can climb through the window and steal your belongings...
Cleaniness: Never have I ever seen such dirty place. It was not even sweeped (clearly he has no made or had in years) there was hair everywhere in the bedroom, bathroom, kitchenware was extremely dirty we couldn't use anything, we were clever to bring our own bed linens and towels, we haven't even touched the common area. Even though the host lives in the same apartment (It's a three bedroom apartment) clearly he is okay to be in such a dirty place.
Value for money: For Vienna it's a good value for money if you are a budget traveller and you don't mind carrying everything you will need during your stay, but even though we also had a budget after this can say that we wouldn't mind to pay more in a better stay. Will not recommend to stay here, better spare more money and stay at a better place. (Or if you are desperate stay no more than a night)