The apartment is very comfortable, clean and well stocked with plenty of towels and blankets. The location was probably the best part of the unit. It's walking distance to Museum quarter and many cute shopping streets and great restaurants.
I would say that the only downside was the amount of stairs you have to climb especially with heavy luggage. Other than that, I would highly recommend it!
We didn't have to chance to meet Ulrike in person but she was very helpful with information and check in/check out and had a friend at the apartment to deliver the keys.
Thank you so much, we loved our stay in Vienna!