Carina's Vienna Vintage Apartments are fantastic. Check-in is easy and relatively automatic. The place we stayed in was spacious and clean, much larger than the photos suggest. The location, while initially looking somewhat out of the way on a map of the city is actually really well situated. It's only a 5 min walk to the u-bahn station that can get you anywhere in the city in 20 min. It's a 10min walk north to Mariahilferstrasse.
One of our favorite parts was the level of detail put into making our stay easy and enjoyable. We were provided a binder full of restaurant, sight seeing, travel, and emergency information, including Carina's personal favorites. There was clear directions on how to properly dispose of trash as well as building rules to make sure we were courteous and being good guests.
This was the perfect home base from which to explore and experience the city. Maximum rating!