José Augusto is one of the most helpful airbnb host I have ever met, e.g. he helped me to arranged a taxi to the airport. If you want a nice, simple, clean place to stay near the airport, it is your choice in Lisbon :-) Moscavide metro station is in walking distance (or take bus 728 which has bus stop very close to José Augusto's place, or if you have time take this bus to go even near to Belém Tower). Parque das Nações area is also very close, which I really recommend to visit.