Andreas and his wife were very warm and welcoming. They provided a lot of tips on what to see, what to avoid and where to eat. Their place is sparkling clean, very stylish and modern, and most of all close to everything: just around the corner from Hofburg Palace. However there is no AC in bedroom. On my first day I made the mistake of dropping my bags off to go sightseeing without discussing a lot with host and when I came back at night host was asleep and my bedroom was very hot and stuffy as there was a major heat wave. So I had trouble sleeping. Opening windows led to street noise coming in. Next day I spoke to host and he gave me a fan for the room which helped circulate air and dull put some of the street noise from open windows. Weather improved too cooling the room otherwise I would have had to find alternative place to stay. I would highly recommend staying at this place only when it is not during summer heat wave.