It's a huge apartment with 3 good sized rooms. It's very clean and well-lit, the kitchen is well equipped. The bathroom was very well insulated, a huge plus when we were there during the cold spell in Vienna! The building is secure and it's a very quiet neighborhood. The tram station (tram 0) will be the nearest stop (10 minutes walk) that takes you to the hbf and you can take the train to anywhere in the city or outside the city.
The only thing that was lacking in the area is some eatery, we couldn't find anything within 10 minutes walk when we arrived to get a quick meal (maybe we looked at the wrong places) but the hbf has good food selection if you are not a fussy eater.
All in all very satisfied with the apartment.