Seriously, simply the best host ever! Not kidding, Peter is an incredibly friendly, smiling, helpful and nice host!!! The best Airbnb I've ever been in. More people like him would be needed in this world. I hope you'll be as lucky as my girlfriend and I to be his guests! We actually feel we got a new friend, not a host :)
Peter (and his friend Sara) even invited us to hang out during a night with them (accept it!!!) and if you're lucky enough, you might even try the delicious bacalhau prepared by Peter :D
He also gave us lots of suggestions for eating, visiting, and many other tips, by replying to my sudden requests instantly, ahah :)
Moreover, the house is in a great location, very few steps from the metro stop (through which you can go to the city centre, to the beach or move from/to the airport). You can even choose to walk, as the house is very central. Just around the house there is a café, a pharmacy, a bank with ATM, etc. All very convenient.
The room is very good too, also for two people, and the bed comfortable :) Just perfect everything.
But I want to underline once more that, besides the very convenient and comfortable location and room, the best you get from this Airbnb is the luck to be host by a truly friendly and helpful person welcoming you in Porto, who most likely will become quickly a friend of yours :)