This is a great flat in an amazing location. Having two extra-large bedrooms, each with its own sofa and TV was perfect for our family since our teenaged son needed a break from us after long days of sightseeing! One note for non-German speakers - the TV programs are all in German and English subtitles aren't available on these channels. The Samsung TVs are great, but aren't smart TVs so if you want to stream something, bring an HDMI cable to hook up to your laptop or tablet.
The beds were very comfortable and it was extremely quiet so we all slept well. The kitchen looks very small but actually has plenty of storage space and is fully equipped, including salt, sugar, coffee pods, etc.. We easily made dinner for 3 several times. There is no microwave, but lots of cooking implements if you need to heat up any leftovers in the oven or on the stove.
There are nice extras in the shower room - shampoo, conditioner, Q-Tips, cotton rounds, 2 hairdryers, etc. and tons of storage space.
This location was ideal. You're just a few minutes' walk from the Rathaus and museum quarter as well as main tram lines. There is a Billa grocery just 2 blocks away, right across from the Rathaus Apoteke and the Anker bakery (best apple turnovers in the city). Local restaurant Centimeter is literally a few doors down and serves large portions of reasonably priced Austrian specialties and a great selection of beers. Make reservations for dinner, though, especially on weekends.
Venera and Herbert couldn't have been more accommodating or responsive. There is so much to see and do in Vienna that 6 days wasn't enough - we will certainly stay here again when we come back!