My five friends and I stayed at Bruno's loft for 4 days and everything was great. The appartment can easily fit 6 people and everything was as clean and tidy as one can wish for.
The appartment is easy to find and ideally located, right in the city center, within walking distance of the riverside and of all the bars and restaurants.
The communication with Bruno was great from the booking period to the end of our stay and he made things really easy for us by helping us planning some of our activities in Porto.
I'd definitely stay at Bruno's place again!