We just came back from a 3 night stay in Vienna at Martha's apartment. We were 2 adults and 4 children in total and I can highly recommend this flat. Martha kindly answered all questions prior to our arrival and upon arrival we were met by her friendly daughter who explained everything in detail. Everything was very clean. The flat is also very conveniently located and there are supermarkets and restaurants close by. It's also a short walk to the tube which is great when you are touring with kids. All in all I can highly recommend the flat.