Luis is a lovely host and has communicated superbly throughout. The place is perfectly located with a gorgeous view of the Douro and the most famous bridge in Porto. The balcony is great for people watching.
The only reason I couldn't give 5 stars was that the place was advertised to have free parking and this was far from the case - there's only car access to the Riveria between 6-11am and no parking whatsoever. The free parking advertised was actually residents only parking for locals about 1-2km away and we felt rather uncomfortable leaving our car here after getting some funny looks from the locals... understandably as parking here was in very short supply. This was a bit annoying as I specifically shortlisted properties that had free parking to avoid this situation.
If you don't have a car I recommend this place wholeheartedly!