This airbnb was my first experience in Lisboa and it was awful. The airbnb (while located downtown) did not meet the needs for guest comfort.
The location is across from a hostel with another down the street so the noise is loud (all hours of the night), with trash clean up at 6am. When I say we were woken up at 2AM, 4AM, 6AM every night- even with earplugs in, thats an understatement.
While that is out of control of the host, it would have been more maneagable if the windows were soundproof and more importantly if there was more than 1 small fan. The temperature was 40C/100F and the hosts did not respond to the request for additional fans, nor were they responsive about it. They on average waited a whole day to respond. The area felt a bit unsafe too as we were told as soon as we arrived to lock ourselves inside the airbnb when home.
Having experienced well over 100 airbnbs, this was one of the worst. There was no "great guest experience." It was here is the keys and here are your check out instructions 4 days later. We mentioned we literally could not get sleep due to the heat (had to keep living room windows open to get some sort of breeze) but to trap noise we had to close bedroom doors and window and blinds. (Bright light right outside the bedroom all night as well.) If they cared that we could not sleep, they would have offered to help.
I would highly recommend not staying here in Lisboa especially in summer.