Overall, we had a great time staying in the apartment! The apartment is incredibly spacious, decorated really nicely, and with a ton of natural light. We stayed with only two people and had WAY more space then we needed - it could easily host 4 or 5 guests. The apartment had great views through beautiful floor to ceiling windows, and a really nice breeze if you opened up the windows. The wifi worked great too, which was a huge plus! While we didn't cook, the kitchen was nice and big and seemed well stocked.
The apartment is on the 3rd floor (which means 3 flights of stairs in Europe) with no elevator and on a hill (to be fair Lisbon is very hilly) so something to think about when booking! The neighborhood felt nice and safe, and while not in the city center was conveniently located.
One issue we did have was the bathroom. It looked very updated in the photos, but felt a lot more worn in person. It had a very musty and damp smell the entire time we were staying. It was pretty unpleasant and did not go away even with an open window. I had seen this issue mentioned in other reviews of this apartment when I booked but didn't think it would be a huge deal. However, it bothered me a lot more than I expected! Also, there was an issue with the sink where it drained incredibly slowly. We couldn't let the water run for more than 20 seconds as it would fill up.