This is a carefully renovated apartment, feeling like new, in a charming old building. Just 4 steps to climb, and delightfully cool despite 35 degrees centigrade outside when I was there. And despite the busy street 200m away with all night trams, it was extremely quiet because I could keep the windows closed. The flip side is that there is no sun at any time of day, but there are tens of sidewalk cafés nearby for that.
And as others have said, you basically only need the number 2 tram to get to where you want, if you don't decide to walk.
I was in Vienna alone and had to spend some time on the computer, there is a perfect workspace for that as well as a comfortable bed overhead. The kitchen area is small but very well equipped and organized, a trip to Billa for groceries takes 12 minutes and you're set for breakfast or dinner - except you should really use the restaurant recommendations the host gives you in the little manual you get!