For my stay in October with around 20°C, everything was perfect from the location to the interior and cleanliness.
There is even a washing machine in the bathroom and the tools to clean the place yourself if you stay for longer.
The communication was nice and worked flawlessly. You can check in yourself via door code for the building and a key box (again with code) right at the apartment door.
One thing, that might be problematic (it was not for me, so just assuming) is that there is a fan but no air conditioning which is still common in Lisbon, although it gets hot in summer.
In summary, nothing to complain about at all, which is rare, except for the possible issue in summer.