Alexander is an amazing person and a great host, he is a helpful, and always keeping up and staying in touch so your stay at his place is the best one you can have, he helped us out to plan our tour of vienna with public transportation and interesting spots, so we had a fluid and knowledgeable tour around vienna and cover everything in two days. he has a great cozy place, extremely clean and modern and walking distance to the Metro Station, I'm definitely staying again on my next trip to vienna.