This place was a real find. Totally excellent stay in a clean, modern, updated, spacious apartment. Check in was smooth with a PIN, seems to be an automated process. Apartment was huge, more than what we needed or expected. Two tv's, laundry facilities, big living room, kitchenette. Owners answered any questions I had before we left and our room was ready early when we came in off the train.
Biggest advantage is location. You are outside the city's main ring, but a 3 minute walk to Friedensbrucke U1 line. You simply take it to maybe Karsplatz, walk 2 minutes and you are in the heart of Vienna. AND, an amazing bakery is directly next door. Great coffee and inexpensive pastries or other things for breakfast. We went there all 3 mornings!
The only oddity was that the toilet is across the hall from the shower and sink. But who cares...not us. Totally awesome experience and we would highly recommend this to anyone spending a few nights in Vienna. Tremendous value. Thank you to the owners and staff for a great stay.