We stayed at Sonia's apartment for three nights / two days - arrived later than expected (due to slow luggage collection at airport) on Friday night and were met by one of Sonia's friends who quickly showed us around the apartment and handed us the keys. We didn't spend much time in the apartment as we were out most of the time but found it to be comfortable and spacious (apart from the shower which is tiny, like other guests had already pointed out). We didn't meet Sonia but she checked via text that everything was allright and was very responsive.
PS! If you stay here and look for a recommendation where to eat: We found a really good breakfast place - Brick cafe (http://www.brickcafe.pt) ca 5 min away and also had dinner in the neighbourhood at a local restaurant (not a tourist place) called Carvoaria Restaurante Grill. Highly recommended: the Mirandesa steak!