Nice stay here. I came solo, but the apartment is certainly large enough for a couple or a couple with a child or two. Within a quiet neighborhood, but not far from good restaurants and the "action". Everything I would need staying in somebody else's apartment for a week was there for me. Very good air circulation from the outside when the wind was blowing from the northwest through the east, and that was much needed​ as I stayed during a stretch of 40C weather in June (no A/C in the apartment). There are several fans to use as well. Fairly steep staircase to the 3rd floor, doable for people without major disabilities and Lisbon as a whole is very hilly so be in shape or you will get into shape coming to the city. Communication with the owners was good, they will direct you how to reach the apartment and are there to help if you need anything during your stay.