Probably the best Air BnB that I have stayed in.
Location: Brilliant. There are three of their Chiado Flats in this block which they have done up very tastefully. The stairwell is a winner and let's you know that you're in a nice part of town. It is located on the street next to the bustling Rua do Rosa in the centre of the town, yet brilliantly quiet on the top floor. It is close to all the shops, some great restaurants and little eateries (all of which are recommended in a little list; a friend that has lived in Lisbon for 20+ years has personally recommended many of them so they can't be bad). It's a stone's throw from some awesome bars and very close to transport links. €9-15 taxi to the airport.
Bedroom: very comfy bed, good blinds.
Bathroom: great shower, well finished room.
Kitchen: simple, but it has all that you need.
Living room: a really nice space. Great, tasteful decour. Comfy sofa, I didn't try the TV - you're in Lisbon - but it was big enough. Bluetooth speakers. Aircon. Dreamy.
I couldn't recommend this enough, it was simply a very well put together flat. They have nearly 20 apartments in Lisbon so it this one is full then ask for others in their portfolio.