Nice, bright flat, very quiet during my stay. The flat is five minutes from a small supermarket and there are multiple bakeries even closer. The neighbourhood seemed very safe.
If you are getting there by metro and have luggage, I recommend walking from Anjos rather than Martim Moniz (as suggested on G maps) as it will be less steep.
The flat was a little low on basic essentials; no salt, pepper, cooking oil or coffee pods, only one dishwasher tablet and one laundry detergent tablet for an eight night stay. The bathroom had hand soap and shower gel but not enough toilet paper. Like a lot of properties in Southern Europe, the flat can be a little cold in the winter, despite the heating. Bring warm jumpers and slippers, and don't run the heating at the same time as the oven or the main jump will switch off.