We had a really nice stay at Diogo's apartment. Easy check in. We were given a map with the most important things to visit/see. Everything in the apartment was as described on Airbnb, small but it had everything we needed! Also, the location was great. Close to the metro as well as a train station. We stayed for two nights and could visit pretty much all of the most important places in Porto by foot.
Our only remark is that the air fan in the bathroom was a bit noisy when it was switched on - we were told that this issue was going to be looked at though.
All around a great stay and would definitely recommend for a touristic trip to Porto!