We had a great stay at Silja's place. The apartment is beautiful, our room was really cosy, clean and the private bathroom/toilets really convenient. We could also share the kitchen which is nice. I really enjoyed the neighborhood, well situated and pretty, close to the museum quarter and with a lot of restaurants and cafés around.
Silja was a great host, she answered to all my questions and helped us to get around while we were staying, and we had some nice chats in the evening.
I will definitly recommend her place for a stay in Wien. All the best ! :)