Overall our stay was okay. Karine was very responsive and the location of the apartment is great. It's very central and close to metro. There is a lot of space in the apartment - 2 bedrooms, kitchen and living/eating area.
We did have several issues during our stay...the shower leaked onto the floor - Karine responded and had her neighbor come to fix it. It didn't resolve the problem and the floor was always wet. During our 6 night stay, the power in the apartment went off 5 times which required us to turn the circuit breaker back on (challenging when it was dark and we were fumbling to find our phones for light). Four potlights in the livingroom and hallway burned out during our stay. - Generally the apartment was clean however there was no top sheet on the beds...we hope the duvets had been washed after the previous guests but we aren't sure.
The apartment was reasonably priced for Lisbon but just beware that there are issues with it.