The apartment is spacious, well-lit with natural light, and very well located for seeing almost anything in Lisbon. You can catch the tram just a few streets away, or walk to the main plaza or the Rossio train station in about 20-25 minutes. I am sensitive to sound when sleeping, and the streets around the apartment are noisy pretty late into the night due to trash/recycling collection and walkers - but when the shutters and windows were closed, you could barely hear a thing! The shutters were also excellent at blocking out light. I'm glad we were there fairly early in the summer, heat-wise, but Diogo provided several fans.
The apartment comes stocked with a good number of blankets, pillows, towels, a refrigerator/freezer and washing machine, plenty of dishes, and cleaning supplies. My traveling companion worked from the apartment and had no issue with the wifi. Diogo was a fantastic host, flexible and accommodating regarding our check-in and check-out times. Our week-long stay was so much fun, I would happily stay here again if I ever return to Lisbon!