Helena's apartment was very clean and comfortable and kitchen was well stocked with utensils and some breakfast options. The check in was smooth and Helena also guided us about exploring Lisbon as a local.
There is public transport and super market available just 200 meters from the apartment and Santa Catarina platform deck is also within walking distance. Make sure you go there for a beautiful sunset.
We were in Lisbon in June and that is the month of festivities in Lisbon celebration St. Antonio. The street right outside was the epicenter of the party all night long. Helena had informed us about these festivities beforehand and we were glad we got to see that wild of Lisbon.
The only problem we faced was the availability of hot water early in the morning when we had to leave Lisbon. (yes it was still a little cold in June).