This is probably the best Airbnb I've ever stayed in, in a long time. The place is super stylish and impeccably clean and the location is gorgeous and key to all the great Lisbon places to visit. It's also very modern and the building is incredibly safe and well kept. Check in precess was great, the offices to get the keys are a few blocks away walk. I'd stay in this place again in a heartbeat!
My only tiny 'hate' (which I know isn't the Airbnb's fault) is the restaurant right below the place plays loud music pretty much all day long and you can hear bass noise most of the time that ruins the otherwise excellent experience of staying there. If this was my Airbnb I'd speak with them to maybe have the noise down a little as it's a restaurant, not a bar or a club, the music doesn't need to be so loud.
This didn't ruin our stay at all, this is a lovely place, next to the river and a minute's walk from great food, drink and sights. I wish all airbnb's were like this!