Maria has a fantastic place to stay! I spent six nights there and enjoyed every minute. Maria's place is well-organized and a lovely place to just hang out. The outdoor patio is great to take a meal or to sit outside, and the interior is well-decorated and inviting. Her apartment has excellent transit connections and is walkable to most anything you need, including one of the main shopping streets in Vienna.
Maria was also a pleasure to converse with regarding any issues I had. Check-in and check-out were expertly handled, and any problems that I had were quickly handled. Her place has most everything to prepare a meal, though be mindful that there isn't an oven or microwave available and there are only two burners for the induction stove.
I would not hesitate to ask if Maria has her space available if you're looking to spend some time in Vienna.