We enjoyed our stay at Diego's very much. The apartment is bright and spacious. It has a nice patio and black out blinds. You are in total control of amount of light and temperature at all times. He met us at check-in and gave thorough tour of the apartment and made sure to explain everything we need to know. He also gave us great food spot suggestions. The apartment is walking distance to many attractions and it is very close to the subway.
I would most definitely recommend this apartment to anyone visiting the Vienna. I will most definitely will be back!