Best location you can get - city centre yet in a quiet side street.
Great value, the apartment is exactly as you see it, there's the air conditioning if you fancy or you can just keep the windows open and you'll get plenty of fresh air (it is on the second and last floor).
It was perfectly cleaned, and the communication was excellent. They even left 6 coffee capsules as a present. There are basic kitchen tools, enough for an average uncomplicated meal.
Extremely compact access tough.. as much else in Lisbon, you have to climb 3 very steep flight of stairs to get to the flat.
The only downside is that 2/3 times a day you get some unpleasant smell of cigarettes coming into the apartment from the neighbors downstairs. It is not the host fault, but it is an issue that should be addressed.
Overall we enjoyed the stay a lot, would be back again!