The apartment is so clean and in perfect condition. M&M is so helpful. We arrived more than 1 hour later than the expected time but they still waiting to help us check-in. The apartment is not situated in the center of Porto but we can go relatively easy by train/ metro (You can buy tourist pass with 15e/ 3 days at the big station). The apartment is around 10 mins of walking to the nearest Metro/ Train station.