Raul is an excellent host. Caring and available, he made sure everything was alright throughout our stay and, though unable to welcome us personaly, was very (very) careful to our welcoming. He had prepared a map and a short « guide » with his favorite places which proved very useful.
His place is perfectly clean, ideally situated (at a 5 minutes walk from the main spots) and his terrace (large with a nice view on the town and the Douro) is definitely the place you want to have a drink on before going to the restaurant for a great « Polvo a lagareiro ».
I definitely recommend him as a host.