I had a hard time getting into Andre's place because he told me he lives on the 2nd floor, but actually he lives on the 4th floor. I went up and down up to the 3rd floor with my pack several times after a long journey, and it was really frustrating. Eventually, I put my pack down and decided to look at all the doors on all the floors (because I didn't hear back from him), and finally found his door and key. So, it was a colossal waste of my time which could have been avoided by an accurate description. Also, the 2nd night of my 2 day stay, I was locked out of the house as the main door was locked and he didn't give me a key to the main door. So, I was forced to wait in a nearby coffee shop (as it was raining all day) only to be told by Andre to just wait around and ring all the bells in the house till someone lets me in. It just seemed very unprofessional like I was a beggar on the street trying to get in. Needless to say, I didn't extend my stay with Andre due to the lack of communication (and I never even met him - which would have been fine if his communication was clear in writing) even though I stayed two more days in Vienna. Overall, I couldn't recommend Andre's place as I had difficulty both days with getting into his apartment.
Andre's place is very clean and functional and it has everything you would need. It's a bit far from all the tourist attractions, so you will have to take the tram or bus to get to the center. But still reachable.