After exchanging messages initially with Sebastian on Airbnb, we connected with Andrea to tie up the logistics of our arrival and meeting at the apartment - she was incredibly reactive and very helpful in organizing our arrival and check-in. When there was a brief moment where the wifi didn't work, she back to us in minutes so we could have it fixed.
In terms of the apartment itself, it's very conveniently located in the cool neighbourhood of Neubau and has a lot of public transport options to be in the city centre in less than 20-30 minutes.
The amenities and the arrangements in the apartment were great as well, for a group of 3.
I would highly recommend staying at the apartment if you want a nice short stay in Vienna.