I stayed at Corinna's lovely place for almost a week. I was welcomed by her friend Verena, who was very nice and patiently explained me everything.
The house was clean and it has a very warm and cosy feel to it, I immediately felt at home. For me it was perfect to come home to after studying the whole day.
Vienna is great, going back I would definitely try to stay at Corinna's place again. Highly recommended.