First of all Nena’s place is really nice and well thought interiors, quite cozy and really clean. Kitchen had basic amenities and utensils. Nena is also very nice and responsive. About location: groceries are just 2 min walk; pharmacy ~5 min walk.
Some things to consider:
Location is ~30 min away from Vienna Hbf( 2 trams and 1 bus far).
Hot water specially for shower: Since we arrived in December and it was extremely cold in Vienna. We had to write this, the hot water in shower runs only tup to ~ 3 min and you have to give some time to hot water to be reloaded.
Noise from outside: Since there are trams and trains running all the time, and house is street facing, expect to get noise from the trams all the time.
Hallways and lights: Hallways looks scary during night because there are no lights, though it looks bit dingy, the apartment inside is really nice.