The location is generally quiet, despite being right next to Roma-Areeiro station, which makes it really easy to catch a train to Sintra or across the 25 Abril bridge. The metro is an easy 250m walk down the road and from there it is less than 10min from the centre of Lisbon. The apartment is really well laid out, immaculately kept and has everything you would want for a short stay, including a washing machine and iron. It is located on the second floor, but the stairs were fairly straightforward to negotiate even with luggage (there is no lift). Access is via coded entry at both the street level and on the front door. The main bedroom was set out as a double for us (it can be two single beds) and our daughter slept on the comfortable sofa bed in the lounge - there was plenty of bedding provided and it was very easy to change between sofa and bed.
There is no aircon so we left the windows open for a couple of nights which meant we got bitten by a few mosquitoes and got disturbed by some occasional noise from the street (bin men collecting the rubbish in the early hours, someone talking too loud on their mobile, that sort of thing) but once we shut the windows and used the excellent vertical fan provided, it was much quieter. We also kept the window shutters down during the day to keep the apartment cool.
We would have breakfast or early evening beers out on the balcony at the back, where you would occasionally greet other residents.
There is a selection of cafes and restaurants within easy walking distance if you want to eat locally but we generally ate elsewhere or used the local supermarket just before the metro station. We did, however, visit the Italian gelaterie, just up the street, every night - it's excellent and very friendly.
Communication with Lena was always excellent and we were able to leave our luggage at the apartment before the check-in time.
We would definitely stay there again.