The place was very nice and clean, with a beautiful view in a quiet and beautiful area, which was very good for us, travelling with 2 kids (one of them 6 months old). Also, it is quite close to city center, even to walk (if you are a rather active person :). The appartment has all you need. Laurence was very nice, helping us with all the things needed for the little one (bed, baby chair, baby bath). She also helped us with reccommendation for places to go, with stores opened (having in mind we arrived during Easter).
I would definitely choose this location again when I'll be back in Vienna and definitely reccommend this plays.