Helena's place is extremely near Interdente metro station. Check-in was a breeze. The room looks bigger than what is shown in the photographs. The bed was soft and comfortable. Toilet was extremely big and clean (there is a huge bathtub!).
Helena kindly offered her fridge if you have a need. There are 2 supermarkets nearby and cafes were aplenty. Rossio was an easy 15min walk on flat street.
I stayed only 2 nights but I could feel the warm hospitality from both Helena and her husband.
I had some difficulties warming up the water for a shower, but both Helena and her husband were always there to help me.
Highly recommended.