This is a great place to feel like you’re really Viennese. The tall doors, retro elevator, and entire building felt so romantically European. (That’s very appealing to an American like me; other Europeans might not care 😅) The neighborhood wasn’t touristy either. The local restaurants and businesses were frequented by locals more than tourists, and you didn’t have to deal with big crowds while walking around, like you would if you were right in the tourist center. That said, it’s still supremely walkable. I walked to all the major sites and never needed to use transit. It also felt safe at night for a woman alone, since there were generally some people around.
As others have said, the shower stall is pretty small even by European standards, and the building was a little noisy sometimes, but I’d still stay there again!