We are a family if four and we stayed for a few days. The apartment has many amenities and is very comfortable (even espresso machine and bath tube) and is in very good location - many places to eat on a walking distance. It is also near a transport hub with underground, trains, etc. Sights like the zoo, aquarium, natural history museum and donaupark are reachable in 20-30 minutes via public transport.
I can only highly recommend Vania's place.