The apartment was great - clean, comfortable, quiet, well appointed and with plenty of space for 2 people.
Cristina (André's mother) welcomed us with lots of useful information and André was also in touch during the week in case we needed anything.
We enjoyed sitting on the balcony watching the comings and goings on the street, including regular sight-seeing groups - the street is a very historic one, which adds an extra level of interest. The balcony is quite small and there is also another one immediately adjacent, so you will get to know whoever is staying next door.
The Graca neighbourhood is a good location, with local restaurants, cafés and bakeries and feels a lot less touristy than many parts of Lisbon. Scenic views across the city too from the two Miradouros nearby.
We found it to be roughly 10 mins walk down to Alfama and 15-20 to Baixa / Chiado. Coming back up is steep, but not excessively strenuous and there is always the historic tram or small local buses.
The easiest way to get there from the airport would be to jump in a taxi as you come out of departures, rather than trying to meet an uber or arranged pick-up who can only stop in the very time-limited drop-off car park.
Our tips for local places - Botequim Cafe/Bar (on the square near the Church & Miradouro) for good beer & tasty snacks; Ti'Ascencao restaurant - just at the end of the street (on Rua do Sol) - small, very new and serving great modern Portuguese food; Graca do Vinho (at the bottom of Calcada da Graca) for lovely cheese and wine. There is also a Craft Beer brewery '8th Colina' just round the corner & their beer is excellent!