The best part about this place is the location. It is a 5 minute walk to Chiado, one of Lisbon's vibrant neighbourhoods, 2 mins from the beautiful Santa Catarina miruaduoro (viewpoint), a 7-8 minute easy and pleasant walk to both Cais do Sodre and Rossio stations, which take you to places like Sintra, Belem, Porto etc. The neighbourhood was pretty quiet at night.
When we arrived, Carolina was there down on the street to help us find the place, and stayed on for a bit to explain everything to us. She comes across as a very friendly, helpful and kind person.
The home is perfect for a couple, it was absolutely clean when we arrived late evening. There was coffee, crackers and cheese which was a sweet touch. The bathroom is well stocked. We stayed for 6 days and the host dropped off a bunch of fresh towels for us in the middle of our stay - very thoughtful of her. She used to check in with us almost everyday if we were ok and if we needed any suggestions / help.
If you stay here, do not miss breakfast and coffee at The Mill which is just a 2 min walk from the apartment. Also recommend Dear Breakfast, which is also a very short walk.
Do note that there are two flights of rather steep stairs so do not pack very heavy luggage which may be a bother to lug up and down.
All in all, excellent location, wonderful host and an apartment that will make you feel like you're home. We would highly recommend you stay here to explore Lisbon.