The location is 20min from Hbf, the inner ring and 3min from Naschmarkt. If you are planning to walk around and looking for a quite place but still not far away from tour spots, it would be nice to stay.
I've seen many restaurants nearby, even opening on Sun so you don't need to worry about eating as well.
Check-in was fast and smooth, the room was a bit old but very cozy, quite and warm. It was quite spacious for a single traveller. Moreover, hot water came very well although I stayed in 7th floor.
There was no slippers in a room but you could get it upon request.
Sound proof wasn't so good, so prepare earplugs if you're a light sleeper.
It would be great if a mug also could be prepared, not only a glass in the future.