The location of this apartment is convenient. It is close to a metro (U3) and Straßenbahn (18) station, so you can easily go anywhere you want, for example 40 min from the airport. The apartment was clean enough. Maxi had provided everything (including towels, bed sheets, hair dryer, toilet paper, shampoo, soap, etc.) that one would need to spend some nights there. He was also easily reachable and answered all of my questions patiently. The heating was very good and we did not feel cold at all. There is an elevator in the building but the apartment is on the 1.5th floor. If you are planning on using the elevator, you must count on using the stairs for half a floor, since the elevator only stops on floor 1 and 2. Regarding the design of the apartment, it is very spacious and every space has a seperate room which would make traveling easier in general. Only one strange choice of design in this apartment is about the separation of the toilet and the bathroom which in itself is a good idea but I expect to have a hand wash basin sink inside the toilet when it is separated from the bathroom. In this apartment the toilet was separated from the bathroom but there was not any hand washing basin sink in the toilet. So after using the toilet, you would need to leave the toilet and go to the bathroom and wash your hands there.
Anyway, regardless of the last point, I would recommend this place for your trips. I am sure you could enjoy it there.