Michael was very helpful to meet our needs from the very beginning. He also responded quite fast whenever we have some questions. We were really grateful.
The location of his place is close to the historical center (15-20 mins on foot), and the neighborhood is nice: a restaurant and a cafe (which I had a good coffee) downstairs, several bars and supermarkets nearby, and the metro station, as well as bus station, are close to the place.
The house itself is quiet, clean, and well-equipped with everything: fridge, coffee machine, and a microwave; very suitable for people who'd like to cook themselves once a while.
A strong recommandation for people who'd like to visit Vienna!