Josef and Celine's place was great! We stayed there over Christmas and it was clean and comfortable! This flat is very close to public transportation and only about 20 minutes to get into the center of Vienna walking. Celine welcomed us and was very nice and Josef gave us informative directions on how to get to the flat. The flat is a little smelly, something similar to mold or damp, but other than that it was great! I would definitely recommend staying here, particularly for the value!