Overall a good experience! Thomas was communicative before and throughout my time there, which was very helpful! Getting checked-in and going home is all automated, which is very nice. Don't overlook the importance of having A/C, especially if you are travelling from a place that normally has AC, it can get very hot in Lisbon.
The place is very central, close to a lot of very good food places, at most a 10 minute walk to the city centre and you can also reach most of the metro and bus stations within 5-6 minutes.
A few things to note: the unit is more narrow, so having big luggages may be a bit of a struggle. Also, the unit is somewhat at the top of a hill, which can make getting home a bit more difficult if you are carrying a lot. A side note, there is a giant escalator from the bus stations that can take you up and it makes the walk back home, MUCH easier, though a bit longer.