This is a really well-located apartment, five minutes away from a metro station, very close to restaurants, a few minutes walk from downtown (Baixa), and next to Avenida da Liberdade, the most elegant avenue in Lisbon. In spite of all this, the apartment is very quiet!
The apartment is modern and very well equipped. It is very sunny, with a huge balcony. On arrival, there was fruit, milk, juice, mineral water, coffee (Nespresso) and tea. There was also shampoo, soap, a hairdryer, travel guides, and probably more that I can't remember. The Wi-Fi works fine.
Check-in was really easy: Joaquim lives in the apartment just below and he kept in touch. We didn't need anything during our stay but we knew that it would be easy to reach him.
In summary, highly recommended!