We had a fantastic 3 hour tour with Adrienn. She was very knowledgable and very patient. We were able to take pictures and she would tell us all the important historic facts. It was like travelling through time. She went with us through a small court yard with a 300 year old tree...something we likely wouldn't have see on our own. She pointed out small little things on buildings that we would have missed for sure! I only can recommend Adrienn for a tour of Vienna!