Staying at this place was a mixed experience. Good things: location, shops and restaurants around, also the electric blanket was highly appreciated.
Now bad things: my bedroom had dust balls coming from under the bed, which meant it hadn't been properly cleaned. The bathroom is covered in mold everywhere even the shower courtain is full of mold. On the second day, the host of this apartment took a shower, afterwards it was my turn, and I found the bath tub was clogged with hair and water wouldn't flush down. So even the host leaves hait in the drain and won't clean it.
The room itself is quite humid and cold; I know heating is not a common thing in Lisbon, but it wouldn't kill you to buy some moisture absorbers for the rooms and especially the bathroom.
I wouldn't stay here again.