Ricardo and Cristina were very welcoming and gave us some good tips regarding good places in eat and drink near the apartment and Lisbon generally . Andre transferred us to and from the airport and was very friendly too.
The apartment was very nice and clean and quirky; it was perfect for me and my sister for 4 nights. The bed and sofa bed were very comfortable and the kitchen very well equipped. The TV had several English language channels as well as many other languages (not that we watched much TV!) and we enjoyed some nice warm late afternoon sunshine on the little balcony.
The edge-of-centre location of the apartment is ideal. It is close to the old lanes and alleys of the Alfama area and less than 20 minutes walk to the city centre through a nice area. The No.28 tram passes close to the apartment and this can be used to get into the city centre and other tourist areas.
The apartment is on the top floor (3rd floor I think) so it may not be suitable for the frail but otherwise I would very strongly recommend it.