Overall, a very pleasant stay. Lots of public transport around, a supermarket directly downstairs so very easy to buy breakfast. Rooms were spacious and bathroom was clean.
Suggestions for improvement: window couldn't be shut in living room, so mosquitoes kept coming in and it can be noisy, we wanted to shut the window for security too. Suggest a bin in the bathroom or toilet, as there's only one small bin in the kitchen. Also suggest providing shower gel or soap as it's not expensive and it would be very helpful to guests. It was also very hot in Vienna (35 degrees) so perhaps provide a fan since there's no air con.
Nevertheless, even though we were missing above, we still enjoyed the stay. The space was worth the price!