I had a great stay at Katarinas place. The location is great- 10 mins walk from train station ‘Wien mitte’ so easy to get train to and from airport (€4) also 2 minute walk to the tram- catch the 1 or 0 to get to best parts of city centre.
Supermarket and hundertwasser museum/ house nearby ! The place is extremely clean and modern, the appliances in kitchen and bathroom seemed brand new! Highly recommend 👍🏽