Merc's place was exactly as advertised, and as we hoped for. You could not be in a better location to explore all Porto has to offer, and yet at night it's surprisingly quiet, despite being at a major intersection. Apartment is extremely roomy (more so than the photos show) and spotlessly clean. We were greeted by Dani, who was warm and friendly and offered to arrange a ride to the airport for us (Uber was cheaper, but we appreciated the gesture). There's a useful little wine and grocery downstairs and apartment is right next to one of the main streets for outdoor dining. Great stay, would recommend.