We enjoyed our stay at Gonçalo's place because of the excellent Alfama neighborhood, but I wouldn't recommend this particular apartment to other travelers.
There is a sweet elderly couple downstairs who are (understandably) bothered by guests who are too loud, and this couple is not mentioned in this unit's listing, even though they can have a significant effect on guests' stay. My friend and I are not noisy, but it was tough to be quiet enough for the downstairs couple because the building and unit doors are loud to open and close. In addition, the electricity in the apartment went out three times during our three-day stay, the water in the bathroom leaked into the downstairs couple's unit, and there were basic amenities that weren't addressed (not enough toilet paper, no paper towels or napkins anywhere, and there were dishes but there was nothing
we could use to wash them). The apartment itself is well-decorated and has enough space for two people, but this did not make up for the shortcomings.
An okay stay in a great neighborhood.