tl;dr I do not recommend this appartment.
It was small, that was to be expected from the description, but the way it was organised made it even smaller. During our 4 nights we found a lot of things that made our stay unpleasant.
"Full bathroom" - or rather lack of it. There was a shower and a toilet in a bathroom but sink was in the corridor for some reason. "Bathroom" door didn't close at all - no privacy made our stay uncomfortable. But these doors were not the only one that did not close - shower doors in such a small shower did not close either. They had two big holes and there was just no way to leave bathroom floor dry after taking a shower. Shower head stand was kept secure with a toilet paper and that didn't help either because it kept falling off the wall with any touch, so we refreined from using it. Lack of air circulation made whole bathroom humid and unpleasant. "Bathroom sink" was flat, completely flat any - any water that came to its corner stayed that way until we've done something about this, because of that on the sides of it, it was super gross, riddled with some kind of funghi. There was also a terrible smell coming out of the bathroom - we think that they are aware of it because there was an automatic air refreshner to cover the smell up.
Lack of sunlight.
During our stay we had to choose, either sunlight inside appartment or privacy, because the only window that provided the sunlight was facing the street, when opened the only place that wasnt visible for the passer-by was bathroom, there were no curtains or blinds that would make it at least a bit more private - only window shutters that didn't let any light passthrough. View from the window was also unpleasant as it was just 4 garbage bins. The other window, the one in bedroom area was facing a wall, tiny bits of daylight made it through. In fact so little that sometimes it was hard to determine weather there was any sun or not.
Noise.
We wanted to minimize our time spent in the appartment to only night as a place to sleep. There was a nice big bed but thats the only positive part of sleep time. Appartment during the night wasn't quiet at all. People coming to the mentioned before garbage bins were making a lot of noise especjally when throwing in the glass bottles (imagine that in the middle of a night). In the morining there were garbage trucks coming to pick them up and they also made a lot of noise. But that was manageable, what really made us upset was how much we heard our neighbors upstairs. Every single step was loud and hearable. On top of that when opened the window to let some fresh air in we were welcomed by loud and reverbed by the wall AC noise. Way too loud to sleep.
Communication.
We were asked about our time of flight, I mentioned that we will arrive by bus in Lisbon Oriente at 2 which is an hour from the appartment. Our host communicated that to a person that would check us in. We were contacted by them as our time of arrival to the appartment was the one of our arrival to the Lisbon Oriente. I messaged them that we would be at around 3. Our bus had a delay and we were later then expected but still we arrived at late 3. During that I received messages that they are waiting since 2 and they wouldn't wait any more and we hurry because they won't wait.
Cleanliness.
In general it wasn't that bad. Towels and bed sheets were clean, but on the floor was scattered with hair. Floor panels were detaching from the floor.
Summary.
Overall poorly maintained place in a nice location.