The apartment is quite small but it has everything you might need for your stay in Lisbon, and the stay was certainly improved by Lucia and Nelson's availability and cordiality: they even waited for us until very late for our check-in.
The location is not central within the city, but the 20-minute walk through Alfama/along the Tagus is very pleasant and the Santa Apolonia station (trains/metro) can be reached within a 5-minute walk.
Recommended!