The location is excellent that is it very close to the central station. It takes like 3 minutes to walk. Also, there is a supermarket and other facilities in the central station so it was very convenient.
It was little hot since there was not any air conditioner but since when I was in Vienna, the weather was not that hot, it was okay. For some of those who stay in this place in hot summer, I think it would be little inconvenient.
Overall, the apartment was really really clean and had everything I need! If I have any chance to visit Vienna again, I would choose this apartment again without any hesitation. People working at the reception were also really nice by the way :)