Great central location in the heart of the Bairro Alto district. That being said, you are in the middle of all of the hustle and noise of this nighttime district and have to anticipate the noise that comes with it. I was there for most of a week and Friday and Saturday were particularly noisy at night.
The place itself is well spaced and accessed by a narrow set of stairs but quite manageable as long as you don't have bulky suitcases. Bed was clean and comfortable and bedroom was large enough for a small desk and an additional side chair for reading. I would rebook this place if I were ever to return to Lisbon.