This apartment is in an ideal location - my favourite part of Vienna, in fact. Michael and Mathias are great hosts - quick with communication, clear and easy check-in instructions and some nice recommendations for the surrounding area.
The apartment is very clean and bright, and a good size. It was lovely to have some pods for the coffee machine, and the large balcony was a real bonus with some sunny afternoons. We made use of both bedrooms and the sofa bed. There is no curtain in the lounge/sofa bed area, so this made sleeping in the early mornings tricky with the light. There is some tram noise in the mornings, but that didn't bother us too much. I had to do some work in the apartment, and the internet was high-speed and reliable.
Lovely location - easy walk into Vienna (and even prettier if you head in via the Rathaus and Volksgarten). Also easy to use public transport with plenty of useful trams on the doorstop. We particularly enjoyed Alser Cafe, Coffee Pirates and Focacceria for breakfasts nearby.