We stayed at the studio for one night. It was quite basic and Vienna was very hot therefore without air conditioning it was warm in the room even with the windows open.
Apart from that, Diana was very helpful. She let us check in at 11:00 rather than the advertised 14:00 as we had arrived into Vienna early in the morning. When we arrived she showed us the maps and directed us as to how to get to the main attractions which were an easy 10/15 minute walk. Everywhere was clean and nicely laid out for us.
Our short stay was fine and just what we needed for the night.