Ingela was a wonderful host and the apartment near Palace Schönbrunn was very comfortable, well-equipped, clean, and beautiful. We arrived lately -- Saturday night around 11pm -- but that was not a problem at all. Ingela welcomed us at the apartment, showed us around, and had even filled the fridge with breakfast supplies. Very thoughtful, since the shops are closed on Sunday (thanks again, Ingela!). Kitchen, living room/bed room, and bath room come with everything a sophisticated and sensitive guest could wish for: washing machine, TV set, stereo set, and even a cell phone (to make phone calls in Austria), and a laptop computer can be used.
The area is very calm and safe. It's a two-minute walk to the metro station, and so the city center is less than 10 minutes away.
We can recommend renting Ingela's apartment in any respect. We had a wonderful time in Vienna and we are looking forward to going back soon!