We (family with 1 child, 11 years) stayed at Eva Und Michi's place for 3 nights early December. The best feature for us was the location, conveniently located next to the culinary NaschMarkt, close to a long list of nice restaurant/bars (try VollPension!), 15 min walk from shopping street Mariahilferstrasse, and easy walking distance from both the center of town (for the fit), and the (KarlsPlatz) metro-station (for the not so fit). The apartment is fully fitted out, has lots of light, and Eva's input and help when needed was always speedy and to the point. Highly recommended.