I've always had good experiences on Airbnb. This place was nice, until it was late night, I went out (solo travel), came back and the door didn't work anymore. It was dark, rainy, and Hugo never replied me. Another guest staying came from the airport that night and he stayed with me outside for 2 hours until someone arrived. Still no answer from the House. Next message was they hoped I enjoy the stay. That night I arrived late again and the door wasn't working again. So I texted Hugo again. No reply. So after calling loud, someone opened the door. Next message from Hugo: They hoped I managed to come inside.
Recommendation: Share a key too, in case the code won't work.
I'm glad Porto is a safe city.
But two nights on a row....
Otherwise it was a nice room, nice location, reachable with public transportation.
hopefully you will work on your door.