Pros: generous layout, lots of air, ground floor on a quiet garden, private outdoor area, located in a terrific neighborhood near to the best coffee shop in town (Copenhagen Coffee Lab); strong fast wifi. Overall this is pretty great place and I would stay again.
Cons: Lots of quirks with the keys and access; ants roaming the apartment—while pretty small in number, they are annoying; windows without screens means you need to close the windows to avoid mosquitoes at night and run the aircon, the aircon is noisy (mostly when getting going—then it gets better), random hodgepodge of furniture and fixtures, common area outside full of dead leaves during entire stay; street reminds of the Lower East Side in Manhattan, it's clean but has the most dog poo I saw in Lisbon haha. All in all, the cons are pretty minor things that may easily be improved by the host and/or forgiven by guests.