We didn't meet Emil but he was a very good host. Emil made sure we could get in to the airbnb without a problem and suggested a list of places to check out around Vienna. The flat is very centrally located and very clean. So everything was good - I have a few nitpicks about the flat however.
The decor of the flat is a bit odd and we didn't enjoy staying in it for long periods of time. The bed sheets are thin and we had one small thin duvet each instead of sharing a single duvet. One comfortable duvet would have really made a difference in the enjoyment of being in the flat.
The flat is top floor I believe and is accessible by a lift/5-6 flights of stairs.
There are plenty of amenities in the flat. Kettle / hair drier etc. I would say this flat would be great for those who want to spend minimum time in the flat and are not fussy about having comfortable beds.