Perfect location with some problems inside.
The apartment is located in Widen district of Vienna which is directly to the south from Opera in 10 minutes walk distance. Naschmarkt with all its nice Middle East and Asian food is also quite close. As well as couple of supermarkets and cafes for breakfast and lunch. The place is easy to get from Wien Hauptbahnhoff by 20 min walk. So if you prefer walking over public transport or car - the location is great for that.
You will live on the ground floor but with windows to inner yard, no noice from the street. The opposite side is less sunlight and high humidity - hard to dry clothes after washing. Inside everything is new and quite compact for 1-2 persons. Be careful while taking the shower - water slowly goes away and you could occasionally flood the floor. But Stephanie, the host, promissed to fix it.
Stephanie provided everything upon request, the checkin/checkout is automatic. There is also great guide about the apartment and places to go nearby.