We had a great stay here. Trinidade station was a short walk away with a direct line to the airport, so very easy to find. Most sights were a short walk away and anything further afield is easily reachable by bus or Uber. There is also Street parking directly outside which was pretty inexpensive for a short period and there are parking garages a short drive away. Carolina was our host and she was very helpful and responded quickly to our questions. It was very clean and everything was in very good condition. One thing to note is that the street noise is audible through the windows, even when closed but this wasn't a deal breaker for us as we were here over the new year.
All in all, an excellent base for our stay in Porto. Would recommend!