We stayed at Christiana's place for 3 weeks. We had a wonderful stay. Great location, 5-10minute walk to supermarkets and retail stores. 20-30minute walk to attractions. We didnt mind the walks because you see alot along the way. The trams are quick and easy way to get to attractions super fast if you want the very quick route.
The apartment itself is spacious, well kitted out kitchen to meet your cooking needs, constant hot water and a comfortable bed. Christiana was so attentive to our queries and any requests. She and her colleagues made our our stay comfortable and enjoyable. Would recommend as a base to see Vienna from.