I and two colleagues stayed at Rute's place for a week for a scientific conference.
The apartment was very beautifully decorated, the kitchen was fully stocked, and there was even a bottle of wine waiting for us.
While the two main beds are comfortable, the bunk beds are probably best for children. I found that the whole bed made very loud squeaky noises if I moved at all, which woke me up though I'm not a very light sleeper.
Something to note is that the apartment in quite noisy: it's closer to the airport and planes fly overhead every 5-10 minutes until about 1 am. We could also clearly hear neighbors and some loud construction going on on the street - but maybe we just got unlucky. We had a hard time getting a good night's sleep, though this is not entirely under the host's control.
The location is a bit outside of central Lisbon, which for us was ok because the conference center was only 10 mins away by foot. However, the simplest way to walk to the center entails crossing railroad tracks via a tall bridge. This makes the area feel somewhat separated from the rest of town.
Rute was very considerate and responsive, and quickly arranged to fix an issue we had with the shower as well. (Note that the separate toilet makes a very loud sound when flushed, so it may be best to use the full bath if going to the bathroom in the night when others are sleeping.)
All in all, the apartment is nice and the host is great. Downsides for us were the location, noise, and some minor things in the apartment that may not be an issue for other guests.