Rainer was very welcoming and allowed as to check in a bit earlier, even though he had guests the previous night. Rainer was also very quick to respond to all my queries during the booking process, and provided very detailed and clear directions.
The apartment was very clean and spacious, with enough room to comfortably accommodate at least 4 people. The location was good as well - it is only a quick walk from Wien Mitte station but at the same time the area felt very safe and quiet.
We didn't have time to use the kitchen much, but it had everything you need,should you want to cook.
It was very hot in Vienna when we arrived but we had two electric fans in the apartment which helped a lot.