Contacted host only a few hours before I needed the place to confirm if I could book late. Good and prompt communication. He lives in same building, so arrival later at night wasn't a problem. The apartment is as good as it looks in the photos.
Jean the host is full of amusing stories and anecdotes, and can point you in the right direction for most things you might need to find locally.
My wife is going to be in Porto in a couple of weeks, so already looking to book again for her.