We stayed in this apartment for three nights. This apartment is really nice! I loved the old features and it is well decorated. Also important: it was very clean. The bed is larger than it looks on the photo, the shower is spaceous, the kitchen has everything you might need.
It's situated in a relaxed neighbourhood and we never heard any of the neigbours.
Roman is a very nice young man, he responded quickly whenever I had a question. We felt welcome and at home. If I ever come back to Vienna, I will definitely try this apartment first!