I lived in this apartment with my girlfriend for 10 days of vacation.
It is located in a quiet area, 5 minutes walk from both metro and tram stops, and within 20 minutes you can reach the center of Vienna and the main points of interest.
Matthias has always been polite and quick to respond and help us.
I particularly appreciated the attention to detail, such as the extra wipes and blankets, the LEDs above the kitchen sink, the presence of excellent pots, crockery and cutlery, very fast wifi and modern television with netflix and youtube.
In the morning I loved to froth milk and make coffee and tea quickly with the machine in the kitchen.
Given our flight schedules, Matthias also allowed us to check-in beforehand and held our bags for a few hours after checkout.