I can recommend staying at Pedros from all my heart! He is really welcoming and friendly! He gave us a lot of recommendations and was also super quick in replying any questions.
The apartment is great! Perfectly located in the city center. The bed was super comfortable and the apartment was fully equiped (oven, nespresso machine, fridge with wine, cheese, ham and milk etc we could use, speakers to listen music, TV etc.)
If we go again to Porto we will definitely stay at Pedros!