Our original AirBnB accommodation was cancelled at short notice so booked this apartment instead. Communication was good throughout. It is located just outside of Alfama near St Apolonia station so reasonably easy to access. Check in was good and host was patient as we were delayed at the airport.
The apartment is very clean but it is basic and a collection of oddments of furniture and outdated kitchen amenities make it a place you do not want to spend anytime in other than sleeping (new pillows are needed!). With a little bit of effort It could be a much nicer place.
Furthermore, the apartment is advertised for 5. Unless your only concern is cost then I would suggest the apartment is suitable for 3 maximum.