The apartment is located in the Ayuda neighbourhood (close to Moniz hospital) and is conveniently serviced by several bus and tram (15E) lines which provide a direct connection to Praca do Comercio (20 mins) where most of the city attractions are (you can also use the Metro and Tram to get to the apartment from/to the airport).
The apartment is very nice, cleaned and well furnished with all the appliances that are needed, however bathrobes were minimal and there were no toiletries available (given the limitations when flying only with a carry-on, this should be provided).
As other guests previously reported, we faced the issue of hot water availability in the apartment and it was really a pain, especially after a harday sightseeing. We had to reset the gas burner several times for it to start producing hot water and, at times (upon having reset it), the burner simply would not light up (I urged the host to fix it asap).
I cannot say anything about Peter (the host) as I never met him, having always dealt with some kind of an agency (in fact available 24/7) which (I guess) manages many of this AirBnB apartments in Lisbon on behalf of the owners.
Make sure you fully read the guidelines provided by the host when checking-in, as this is done through a self-collecting key procedure.
Lisbon is a very nice city, I hope you enjoy it as well as its weather.