We stayed at Grinuy's apartment over Xmas-New Year. For a short stay in Lisbon, the flat is ideally located, and great value for money. Few minutes by foot to mini-markets, the tramway, the water, the metro and suburban train station, and lovely eateries and bars as well. Despite this central location, the flat is surprisingly quiet and peaceful (no vehicular traffic on the side street)!
Grinuy was always available with his prompt replies to our queries. Finding the place past midnight on Xmas eve and checking-in were not an issue at all, thanks to the accurate infos and instructions shared with us. Special thanks for the very fine bottle of wine that was placed on the table as a welcome :-)
To bear in mind, though, is that the kitchen is pretty tiny - so for those planning on cooking large meals at home, this might be a bit tricky ... The flat and the host get 5 Stars from us for everything, so this is not a criticism, just a mention.
Bottom-line: recommended!