The apartment is very nice fairly new and spacious and is somewhat centrally located to most things. If you choose to take the train it will be a 15min walk to either train stations (rato or Baixa-chaido) , an alternative is uber.
The AC in the double bedroom did not work, makes loud noises all night keeping me awake all night which was annoying until I gave up using it. The bathroom is really tiny, you will have limited space in the shower unless you are a child or opt to use the 2nd bathroom which has much more room.
The host informed us that the living room AC did not work so we were aware to avoid Turning it on but the bedroom AC also did not work and the nights in the room were not comfortable. Also the beds are hard as a rock. Everything was decorated nicely lots of Ikea but cute, if you don't mind sleeping on a hard bed his will be just fine for you.
And lastly, they are not flexible at check out, don't allow you to leave your bags past 11am so plan flights accordingly or take your stuff to a paid luggage storage facility.
The neighborhood is quite charming very safe and cozy.