The apartment is beautiful. We stayed with 3 children for 2 nights and were very comfortable there. It is sparkling clean and decorated in a contemporary and tasteful style. Three rooms with large double beds, one bathroom and one en suite both with showers. The beds are quite hard, which suited my husband if not me!
Paulo was extremely helpful. He was there to meet us despite us arriving a few hours ahead of schedule and provided us with helpful information - maps, tips, advice on public transport etc all in perfect English.
The kitchen is well appointed with dishwasher, fridge/freezer, coffee maker, toaster and kettle, and there is a supply of essentials such as coffee, tea and sugar. There is a washing machine and a small balcony space with table and 2 chairs.
It is quite a long walk into the centre of Porto, but doable. We also used the bus/tram/Metro system. There are lots of useful shops and restaurants near by the apartment in any case however.