Prosi apt #7 is the cleanest B&B in Wien! I give it 7 stars for SUPER CLEAN and is also very large flat. This flat is brand new! The bus is right outside the front door and 2 supermarkets also right outside the front door. Twenty minutes to Stephansplatz. Ten minutes by bus to the U Bahn, and seven minutes on the U bahn to Stephansplatz with just a few minutes walking. Very easy once you do it. Also, the family that owns this flat is very friendly and helpful. You just have to email them. I have to give this B&B 5 stars!