A really good place to stay if you are planning to spend all day out and you are not looking for anything fancy.
The beds are okay. The bathroom is a bit small, enough for two but I can see it being too small for more people. They have a sofa and some cushions so you can relax there for a bit, no TV. The floor is a bit noisy and you can hear the neighbors (they did a bit of noise some nights with their tv). They have a small kitchen we never used.
Overall, I would recommend this place if you are just going to be there sleeping. The location is 10/10, in front of the university and close to a lot of restaurants and shops. You can walk everywhere. We never used any public transport while in Oporto in this apartment.