We visited Porto and stayed in this property for our 2nd wedding anniversary.
It's a lovely apartment. Clean, centrally located (with a view of a charming medieval cobbled street), and easy to get to from the airport by Metro.
Despite the tiny (really tiny) bathroom your will have everything you need for a comfortable stay - including fresh pastries every morning. Check in was super easy and the hosts have lots of ideas for walks to take and bars to visit.
Can thoroughly recommend this place, and the restaurant 2 doors up the street. In fact, the whole city of Porto was pretty brilliant!