Absolutely the best host you can find in Vienna! Extremely quick responses at all times. Very polite and helpful. He cleaned every day and he took the trash out himself. Also, the day we left the house we lost an important jewelry somewhere in the house and we realized it only after we had left. When we told him this, he immediately went back to the apartment and searched even in the vacuum cleaner in which he found it. I can't thank him enough.
The place is shared with other guests but it is very quiet. We never got disturbed by the rest. It has one bathroom for men and one for women (which smelled fantastic). There was always warm water and a lot of shampoos available for use. It also had 3 refrigerators. The location was one of the best. Very easy access to public transport and close to the center even by foot.
I recommend it 100%.