Clelias place was very nice for us - 2 adults and a baby. We stayed for 3 nights. The area is central but also feels more authentic than the main streets. Be aware that you must climb stairs both in apartment and on street - but it is Lisbon after all :). Bed was comfortable and for baby there was a travel crib set up. Apartment had all amenities marked - even some spices, oil, vinegar for cooking.
Clelia was very responsive via phone, and we used her guide for places to eat around the area. It was very handy. Clelias friend Raquel greeted us and showed everything.
Thank you :)