Just wonderful. My room was even better than I expected, equipped with wardrobes and shelves that are very useful for long stays. It was love at first sight.
The house is very nice, clean and located in a completely quiet area of the city, even though it's a little bit far from some places of interests - well, that's absolutely normal and understandable in a big city like Vienna, and I wouldn't mind that too much.
You will find kind and always available host(s). If you need anything, just write a message to him and he will quickly answer - that's something that must not be underestimated.
I really recommend it.