Pros: Great apartment, well located. Hostess (Susana) is kind, efficient and helpful.

Cons: Dodgy owner--Promises amenities the apartment doesn't have. So by "Free Parking on Premises" he means "good luck parking on the streets of Porto" (I ended up with a big parking bill and a refund from Airbnb) and "Hot tub" means "shower stall with hot water".

And it's not much use trying to argue with him about this---he denies he ever promised such a thing and then changes the listing (fortunately airbnb kept a copy of the original, and I took a screenshot).

Bottom line: Not worth the trouble.