For us the apartment was ideal - pretty centrally located just a few hundred metres from Rossi Square and Roman was very helpful offering suggestions on where to eat and shop, live music that was on during our stay etc. The kettle was not working one morning and was replaced by the time we returned that evening.
We used the apartment as a base to see the sites in and around Lisbon so only really slept there, eating out for meals. The bed was comfortable and the kitchen well equipped. Our only issues were that the shower/toilet is very cramped. I am 1.8m tall and could only just sit on the toilet. Also there is a lot of building renovation work in the area at present. Had we not been getting up early and wanted to sleep in it would have been noisy, although this is only until the work is finished of course.
There is no air conditioning, so again it was fine for us as the temperature was mild but I would imagine it would be too hot in mid summer.
Nick Sept 2019