We spent 6 nights in the apartment, and couldn't have been happier with our choice. We would have loved to stay longer, and will definitely stay again when we next go back.
Santa Catarina is a great area - quiet, yet central and close to Chiado and Barrio Alto.
The views are incredible, in every direction.
The shower is a real pleasure.
The bed was extremely comfortable. Kitchen has everything one could possibly need.
The airconditioning was efficient - keeping us nice and cool in the 38 degree weather.
There are plenty of nice places to eat in the vicinity - we liked La Pharmacia for lunch, and 151 on Rua do Rosa (great octopus!).