Very nice apartment with beautiful views over Lisbon, very close to center, hisorical areas, transportation.
Philippe prepared us before our trip with suggestions, tips, and useful information.
Philippe and his friends welcomed us (me and my wife) right after our landing in Portugal. The apartment is on the top of the building, so you have to climb at the fifth floor with your stuff... but the award is fantastic. We've found great weather (even if quite cold at night) and staying on the balcony to drink a coffee was extremely pleasant.
The living room have a kitchen-corner with a small fridge. We just had breakfast, so it was much more than we needed.
The area (walking down to the center at night) need a kind of normal caution. You don't need a car. Taxis, public transport, and your legs are ok. Don't even think to rent a car while you are in Graça. Parking and steep roads will not make it easy.

The flexibility for the check-in and check-out was perfect.
Overall our second airbnb experence was a 5stars one!