Great, mainly quiet (building work started in the morning each day while we were there) location. Super close to many areas of Lisbon but off main roads. As others have said, it’s hilly and upstairs, but this didn’t bother us.
The flat is nicely decorated and there was shower gel and plenty of towels. The pillows are thin though - top tip - add a couch cushion!
The drains smell really bad - we found leaving the bathroom window open helped.
Michele who let us in was really nice and shared advice on things to do, but the Airbnb lacked some of the welcoming touches others have and advance communication wasn’t good.
I wouldn’t rush back here again, but it was a decent base for exploring Lisbon, which is a great city!