Aida's apartment is great. The location is superb, just a few steps away from a U-Bahn station, multiple supermarkets, and restaurants.

Check-in/check-out and communication in general were very easy and pleasant.

The only comment for fellow travelers is that there is a construction site next to the building, so it would be a good idea to carry ear plugs if you plan to sleep past 7.00 in the morning.

I would definitely stay again in my next trip to Vienna, and can strongly recommend the apartment for both short and long stays.