The apartment is exactly as it's described and the hosts were truly wonderful. They were attentive and helpful throughout our stay.
If you are new to Lisbon you might find the building "interesting" if you get there at night. There's lots of graffiti around the building and it's got an industrial vibe with tons of concrete and clothes drying off the balcony. That said, those are all just part of the culture and the apartment was a bright, colorful contrast.
Lisbon is a safe, beautiful city and this apartment is located right in the heart of it. You're going to love it!