The apartment was perfect for our 3 day stay in Lisbon. It was right in the old town area, so everything was really close by and within walking distance.
Since the apartment is on a busy (pedestrian) street, I was a little worried that it might be noisy, but in fact it was super quiet - when closing the window shutters and the bedroom door for the night, I didn't hear any noise from the street whatsoever. In fact, I slept like a baby there - the bed was really comfy.
The kitchen was fully equipped, so we made our own breakfast every morning. The staff in Blue house (across the apartment) was very friendly and helpful and gave us recommendations for restaurants and bars as well as helped us book a tuk-tuk ride with the great and knowledgeable driver Eva. I would definitely recommend this apartment to you.