This is one of the best airbnb apartments we've ever stayed in! We were there for 6 nights and really felt at home. The apartment is in a new building with an elevator, it was spacious, stylish and comfortable. The bed was perfect and the shower was amazing. In the apartment there was everything we needed and more! The location was in a flat area of Lisbon so there were no steep hills or stairs to get to the building (so rare in Lisbon!) and still within walking distance to the city center.
The few downsides were:
1. There is a construction site right next to the building, so that is the view from the windows, but when they were closed you couldn't hear anything so it was fine for us. There is also great air conditioning in the apartment so we didn't really need to open the windows.
2. There is a problem with the electricity in the kitchen so we weren't able to use some of the appliances. They said they would get it checked so hope they did.
Apart from that everything was perfect, would definitely go back :)