We have rented two apartments near Se de Lisboa (The tiles house and Se Attic). Location is very convenient - just a new steps from the Cathedral and St Anthony Church. Walking distance to the all major parts of Lisbon. Both apartments were very clean and equipped with all necessitates.
Steps to the attic were a bit challenging after the whole day of sightseeing and 30 C but air condition in every major room and bedrooms was a huge bonus.
Communication with Vanda was superb. Vanda has arranged for the airport pick up - which was very nice after 5 hrs flight delay.
We will definitely recommend both apartments and Diogo & Cousins's as hosts.