We really enjoyed our stay in Porto. The apartment was really cozy and it had all we needed. And the hosts were responsive and attentive!
The location is perfect for exploring the city but comes with a drawback: there was a big renovation/construction job going on at the street of the apartment. Unlucky, but not uncommon - many other streets in Porto were in the same situation. Sadly, the work goes on even through the night. It wasn't dramatically loud but it can be annoying if you're sensitive to background noise for sleeping.