We had a great time in Lisbon. The location is great as it is not touristy yet you can walk everywhere easily. The accommodations was very clean and like on the photos.
Just be mindful that it can be very cold in January so you might need to sleep with the Heating option if the AC turned on, which we first needed to get used to.
Something that is not the fault of the owner but worth mentioning for noise sensitive people: you can hear the airplanes (starting from 5am) quite intensely. So bring your earplugs if you are noise sensitive to planes.