I rented a place from Beata for my first 4 months of living in Vienna. The location was great to get to know the city -- close enough to walk to work, explore Augarten, etc.
Beata also went above and beyond to move me -- for the same price -- to a larger apartment than I first selected because of my long stay and career stage (beginning PhD research). When we met in person to do my Meldezettel paperwork, she was kind and fun to talk to.
Her son Philip greeted me and showed me the place because Beata was out of the city when I arrived. We went through the paperwork; he was clear about everything, and also kind & fun.
The apartment has nice midday sun, which was a pleasant relief after 4 years in Finland, approaching my 5th winter. I only wish the apartment's couch was more comfortable for relaxing and there was a chair/desk more suited for laptop work. Great place overall, great people.