Carmen’s place is good value. There is 1 bedroom and in the living room the couch folds out into a bed where it is comfortable for 1 person to sleep in. Location wise, it’s a 15 min walk to the lively part of Porto so you are in a residential neighbourhood. Uber is so cheap though so we ubered it home every night for 4€, you could walk it but we preferred to uber home due to the street being dark and not too interesting of a walk. The walls of the flat are very thin but it was a comfortable stay. Didn’t use the kitchen but they have a little patio garden at the back. To get to the airport is great because the Metro station is a minute away