Firstly the apartment itself; attractive & very spacious with plenty of room for a large group to relax in. Well provided for with all mod-cons & good bathroom facilities.
Secondly the location is a great one; to the south west of the city toward the river, so easy (bus) access to the city centre & also the many attractions to the west of the city - LX Factory at the base of the bridge, Belem, as well as Cascais further afield (a train journey away).
Also there were plenty of excellent restaurants, cafes, boulangeries, etc. (as well as the Museu Nacional De Arte Antiga with its fantastic garden/roof terrace cafe with views of the river & bridge), within easy walking distance of the apartment.
Finally, the hosts; Miguel was incredibly friendly & helpful, with tips, advice & offers of help with booking taxis etc. & offers of clean towels throughout the week (we didn't take up that offer!). On top of all that, & they were already on course for a 5 star review, an expensive item that was accidentally left behind in the apartment by our young nephew on our return home, was posted & safely returned to us within days without any request for recompense.
Many thanks Sofia & Miguel (& Miguel's Mum),
Tim.