Pros: Excellent location. The living room/kitchen area is large. The full kitchen allowed for some home cooking. The place was warm during our stay (cold days for Lisbon standards).
Cons: As others have mentioned, there is some considerable sewerage smell coming from the kitchen. It never completely went away despite our frequent use of the sink. The floors, while they looked quite clean at first, were actually quite dirty and there was a lot of dirt/dust under the beds. Probably not mopped? There were 2 instances of power outages. No help from the host (answered call but no useful tips/ and no crew sent to investigate) but they resolved without interference within 15 minutes or so. Our neighbours didn't have power for an entire day and changed their accommodation due to that.
Minor issues: There weren't any places to put your shampoo/shower gel in the bathrooms. The same goes for the entrance - no place to hang your coat there.
Overall: Don't regret staying here