The best thing about Andrei's place is how centrally located it is. Most things in central Vienna are easily walkable. If you want to take public transit, there are several stops that are very nearby. We loved being in the middle of the city and being able to walk to so many things.
Communication with Andrei was very good. He was very prompt about responding to my messages. It was easy to check in, we met at the apartment and he gave us the keys and showed us around. Check out was also very easy, as we just locked the keys inside the apartment.
Andrei's place was very clean. The building has a washer and dryer on the ground floor, and we really appreciated that Andrei had laundry pods and a drying rack for us to use.
The only small negative for Andrei's place was that it doesn't have air conditioning. I probably wouldn't stay here in the heat of the summer because of this. But any other time of year, I would happily stay here again!