The location of the apartment is excellent! It's only a few minutes on foot to Schönbrunn, and maybe a minute to the U-bahn. It's also a nice and quiet neighborhood.
Viktoria was really nice and communicative, so we handled our check-in and check-out smoothly.
However, I would not advise this apartment for people who like cooking, since the kitchen space is quite cramped up. Also, there are a lot of personal things around in the entire apartment and a guest doesn't really have much space to leave their stuff somewhere.
It's also not advisable for people with back problems, since the mattresses are not particularly comfy.
All in all, ok value for the money. You won't find anything as cheap on such a good location.