Nuno was a wonderful host immediately upon booking our stay. He sent out a friendly message right away and continued to keep up with communication up until our arrival. Nuno was kind enough to also arrange a pickup for us at the airport from one of his friends who was incredibly generous with his time (our flight was delayed) and even recommended some of his personal favourite spots in Porto.
The check-in process was easy. Nuno personally couldn't meet us for our arrival time but his father did and he was a friendly man. Nuno left a detailed printed document on the goings-on within the apartment and also what to do in/around Porto. Check-out was also a breeze as all we had to do was lock up and drop the keys into a designated mail box in the front entrance area.
The apartment itself is very tidy and very thoughtful in design/layout. Everything you could ever need was there, available for use, and intuitive to find. My only gripe was that we were visiting during a hot spell and there was only one fan available for use. Since there are two rooms in the apartment, only one of us could use it at night because it wouldn't work to have it blow into both rooms as it was not an oscillating fan. It made the hot nights extra hot but is an easy fix for future guests.
The neighbourhood in which it is located is perfect as it is central to everything that is lively/interesting in Porto and is easily walkable to/from a lot of cool spots. It can be a little noisy at night/early morning but not because people are loud but because glass bottles that are being thrown into garbage cans echo through the streets. It is a non-issue as it brings authenticity to your stay. Just close your windows if you're sensitive to that!
Overall, we (there were 3 of us) had a lovely stay at Nuno's and would highly recommend staying there to anyone visiting Porto.