Lovely spacious, airy flat in a great central location. You can easily walk to all of the sights from the apartment. Underground parking was a great advantage, for our hire car.
The Yellow hop-on hop - off bus tour was great for an overview of the whole city. It covers two separate routes, which we travelled on over two days. The price includes a 45- min boat trip and a visit to a Port wine lodge - great value. Their are bus stops for all the tours (Red Yellow and Blue) very near the apartment.
The apartment is surrounded by restaurants, bars, cafes and great shops ( and an indoor shopping mall, with a Saturday market actually on the ground floor of the building in which the apartment is situated). The mall shops are interesting - small, specialist slightly quirky/arty, and we had a great time buying local cheese, pastries , wine and veg at the Saturday market.
A negative point was the barking dog, whose run is below the patio. He is let out into the run from early evening until dark. However, we discovered that if you squirt cold water on him from above, he shuts up and retreats into his owner's garden for a few hours. Barking dogs are everywhere in Northern Portugal - the are often chained up or caged ( presumably kept as guard dogs) and the Portuguese don't seem to notice the din. So you'll probably encounter this problem in most apartments.
Communication and meeting/greeting was very good. Overall a great place for your Porto visit