If you are thinking about going to Lisbon - just go! If you are considering booking this apartment then do it - don't bother looking at anything else. The apartment is modern, clean and ideally placed. The high ceilings give it a feeling of luxury and the exposed wood frames a great touch and nod to the way the city was rebuilt to be earthquake proof. A very quiet apartment, where you don't even hear the neighbours so is a relaxing place to return to after a busy day sightseeing. The code entry is ideal, so you never have to worry about taking or losing keys and communication with Paula is very easy and quick - we always had a reply in minutes. It has everything you need inside for a comfortable stay.
The location is superb - at one end of the road the starting point of tram 28, and Rossio, and at the other the main square. We were surpised how many times, when wandering around we suddenly came upon one or other end of the street (the hills and lifts can make finding your bearings a little tricky!). It really is near the centre of all.
The apartment is easily located from the airport - use metro to Baixa-Chiado, exit the Rua de Crucifixo side and walk straight ahead, crossing about 5 streets to the lift (elevador - indicated with a huge sign about it) and then at top of the lift turn left, 2 doors down is the apartment.
If we go back to Lisbon, we will definitely try to stay here again.