I was in Vienna for a city break and was really, really pleased with Paul's place — he has done a great job reconditioning this historical apartment and giving it a minimalistic, modern look. It was really quiet, although it is 1 minute walking from Mariahilferstrasse, on a small picturesque paved street.
The apartment is as clean as they get, the bed was really comfortable and the kitchen is really well organized and equipped. Not to mention the host really spoiled us with espressos to our own pleasure :).
Paul seemed a really easy-going person, very flexible with check-in and out hours and very willing to make us spend the best of times — he gave us his own map of Vienna, so we had the options of a local at hand instead of heading for boring tourist traps.
Highly recommend this place!