The apartment is impeccably clean and spacious. It has a fully equipped kitchen, so you can find there everything necessary not only to warm up ready made food but also to cook and serve the table. As it seems to me the apartment is designed in a typical modern German/Austrian style - quite ascetic, all pale and white, except for the old dinner table and chairs.
The location is very good. Although located a bit far from the center, it take about 15 minutes to get there by metro. The apartment is about 2 minute walk from the subway station. There are several shops and cafés in the neighborhood. The area is quiet as well as Vienna in general. The only thing which can disturb you (in the early morning) is a church nearby. The clock starts striking at 7 am and repeats every 15 minutes, so if you're not an early riser, it can be a problem for you, especially when the weather is hot. As there's neither air conditioning nor a fan, the only way to escape the heat is to sleep with the windows open which doesn't always help, so with the open window you'll hear every strike of the church clock.
So to sum it up, the apartment is good but absence of air conditioning can be a problem when it's hot.