We spent three great days at Sofia's apartment in Lisbon with our 2 kids (2 and 4 years old). Apartment is located very centrally, on a narrow cobble stone street and up 3 flights of steep stairs. It's an older building, but the apartment is spacious, very clean and had everything we needed (including the fastest internet I have ever experienced in an Airbnb). The hosts were very responsive and helpful (we tested two restaurants they recommended, and both were great).
They also recommended a local startup that picked up our luggage on the day of the departure, and delivered it a few hours later at our rental car pickup for a very reasonable fee.