This is not a very touristy area to stay. It is out of the crazy busy area. It takes about 30 minutes by foot to reach the busy touristy Praca do Commercio down at sea-level. Walking back takes longer as you must go up steep hills. It's ok to do once to see the sights but after that I would Uber around. It's quite cheap to use Uber in Lisbon. Even cheaper than using the Lime scooters. Using scooters is not comfortable in Lisbon because of the hills and the cobblestone roads. (I tried it, I don't recommend).
The apartment is very simple. Just a place to sleep for a few days.
Also bring ear plugs. You can hear the traffic outside very well, and you can hear the neighbors snoring, coughing, talking, watching tv etc. A few times I was worried someone had come into the apartment because you can hear what the neighbors are doing very clearly.
You can also easily hear anything that is happening in the stairwell.