The apartment was very clean and had everything we needed. The internet was fast, the appliances were like new, and the decor was tasteful. The street it is on is quiet, and is very well connected to the rest of Lisbon. We did run into a few things of note:
The lock to the building entrance was finicky and took a while to get in the first time, though once I got the hang of it it wasn't a problem. The key to the unit was also not obvious that it extends. This was not mentioned in the communication from the host and it was a bit frustrating to figure out as we got in late at night.
Walls are thin. Occasionally we could hear the neighbors - music from next door, and more persistently footsteps from the unit above. They have young children that run around for long periods of time, occasionally until past 10 or 11 at night.