Amazing apartment! Absolutely gorgeous, clean, well maintained, classy and much bigger than the pictures. As everyone else has said, great location across from Metro and Nachmarket and lots of supermarkets, pharmacies, bars, cafes. Was a 15 minute leisurely walk to ring road (Opera) and another 5 into middle of old town. But option to take metro (U Bahn) or trolley was really helpful when tired or wanted to pop back to town quickly. No noise from the main street below. Air conditioning was a plus, but in the end not really needed as we hit comfortable July weather.
Great mattress and linens, pillows (too) soft, lotions, soaps, shampoo included. Coffee capsules but no basic cooking ingredients (spices, sugar, oil) but fully stocked kitchenware.
Would highly recommend the apartment based on its location, style, cleanliness and the cost can't be beat. Worth being a bit 'outside' the main city center to get more of a feel of non-touristy Vienna. If we visit again we would without hesitation come back.