This was a wonderful place to stay. The apartment is clean, bright, airy, and spacious. Everything that's necessary to stay for a long time is provided.
The internet is fast (100mbps) and the apartment is good for working.
The best attribute is of course the location. I've stayed in Lisbon a few times and this is easily the best location.
One negative was that the building sharing a wall with the apartment was doing construction during my stay, so jackhammers were going off 8 hours a day. But, that is not the fault of the hosts, and shouldn't be an issue once construction is completed.
I would certainly stay again!