I stayed at PinPorto with four of my friends for four nights in June and we had the best time! Porto ist beautiful and the appartment was perfect for our weekend-trip: it's perfectly located and beautifully styled and furnished. I would totally recommend it to everyone wanting to stay at a trendy, central and super clean place. The host was very uncomplicated and made checking in easy and gave great tips as to where to eat the best pastel de nata and other essentials in porto. We were five and although the appartment isn't huge, there really is enough space for everyone. There is a bar across the street and on weekends it can get noisy because people are out on the streets chatting and smoking, however, the windows are pretty soundproof and it didn't bother us at all.
Would totally recommend PinPorto!!!