Gudrun and Armin were superb hosts. We got plentiful information prior to the trip, and they followed up on our change request and at arrival. The apartment is only a couple of hundred feet from the main shopping street of Wien and also really close to the main sightseeing spots. The apartment is more than big enough for 4 people, and is in a quiet backyard. There were plenty of towels and other bathroom facilities, and a small fully equipped kitchen, ironing board and basically everything you need for any amount of days stay.