Helena's apartment is in a fantastic location on the edge of Alfama, making accessing the heart of Alfama just a few minutes walk, while also making it only 10 minutes to reach other central neighborhoods like Barrio Alto. If you're looking to stay in the heart of the party scene perhaps this isn't the place for you, but you probably know that going in since Alfama is a quieter area. That said, you're within 5 minutes of a dozen fado restaurants/clubs (reserve in advance) and there's a nice little cafe next door called Pois. The apartment is just across the street from the Cathedral Se.
The apartment itself is really lovely and is in an old building (it's Alfama after all), but it appears to have been recently renovated with a modern feel. Nice bathroom and shower, modern kitchen, spacious living room.
Helena communicated well and made the checkin and checkout processes easy. Our flight in from London was severely delayed, but timing worked out such that her husband Miguel was very kindly able to pick us up from the airport.
Definitely recommend staying in Helena's apartment!