The location of the apartment is very good, about 10/15 minutes walk to the very centre. It’s uphill but then most of the city is uphill :)
There’s a supermarket nearby and plenty of shops and cafés around. Tram 28 passes just in front, and the metro is also not far.
The apartment was comfortable, small but had everything we needed for a few days.
As other reviews mention, it’s a 4th floor and the stairs are very steep (you need to take care specially going down - but probably most old buildings in Lisbon are the same).