We stayed in Harry's apartment for 2 days long and it was pretty good experience for us.
Even if Harry's mother get mad a little bit because of we arrived 30 minutes late - so so so sorry again :( - overall they both are so helpful and friendly to us.
House was good enough for 2 days experience and really close to tourist attractions. Subway station was so close to the house and you can go almost everywhere in Vienna by subway, but if you enjoy to exploring the city by walking and lost on the streets, this is way better option to see around.
Shortly we enjoyed in Vienna a lot and loved to stay Harry's home and definitely recommending it.