I was staying in this apartment for second time, this time with my boyfriend. Armin was very nice, polite and informative about city and tourist attractions. He was also very flexible about check in and check out.
We really liked the apartment, which was very cozy. The kitchen is a bit small, but well equipped (free coffee and tea...), so it was manageable. The bathroom and bedroom were both very stylish and clean, although the bathroom was a bit cold. I am sure if we would have mentioned this to Armin, he would have done something about it, but we didn't bother to do it, because it was not a big problem. Otherwise apartment was nice and warm. The only really complaint, which doesn't even concern Armin or apartment is the occasionally noisy neighbors.
The apartment building was very nice - clean and bright.
Public transport is very easily reachable and excellently connected to the city center and rest of Vienna (SCS). There are plenty of shops and convenience stores near (Billa, Punkt, pharmacy...)
All in all - we will be staying in this apartment again. We would also recommend this apartment highly.