Museum access is quite literally on the same street. Exactly what you're looking for if Vienna's museums are calling to you. The apartment is spacious and clean and modestly furnished. Erich is very punctual and accommodating and our stay was wonderful.
There aren't any fans on the floor and we visited during summer (which really isn't bad). But if you're going to be inside the apartment during the day just be aware. Additionally, ,during our stay there was construction in the building that did start in the morning. It was loud enough to wake us, but not so loud to cause pain.
Other than these minor notes, the stay was everything we hoped for while touring the history of the great city of Vienna.