Great apartment! Exactly as the pictures. The experience from start to finish was first rate.
Communication was quick and efficient, from booking an airport transfer, to arranging to leave our bags at the office around the corner, to having recommendations for places to visit etc.
Very central location, with pretty much everywhere you'd want to see (as long as you're comfortable walking up and down hills - that's Porto!), within reasonable walking distance.
For context, we're a group of 5 (50 yrs+) mates, who try a different city break each year on a 'reasonable' budget. This apartment and Porto were up there with the best.