The place is in a good location - you can walk to central Porto and there is a metro stop within a few minutes walk. Also shops are within 5 minute walk for any food supplies you might need. The apartment is in a recently renovated building, and mostly looks quite fresh and new. There were a few cleaning issues, but it wasn't anything major. The air con is currently broken, so the host provided a fan, but was unable to assemble it, I managed to which was good as it was almost 30 degrees. The layout of the space is pretty good, but the stairs to the bedroom are less than ideal - the first step out of the bedroom is about twice the height of the rest, coupled with the narrow steps its quite tricky to get down. The bottom step also sticks out a few inches into the doorway from the hallway, with a bench situated against the opposite wall so the door becomes quite narrow.
The balcony is small, but big enough to sit at the table, and gets the morning sun once it rises above the houses behind.
Bed was nice and comfortable, and there was everything we needed for our short stay.
As others have mentioned, there is an issue with the shower door - we were told it opened only inwards, but arrived to find it opened outwards and it does not come close to closing. When we checked in, we were told that the owner, and a host of others were currently in the space and looking at the shower and a few other issues. So we had to wait an additional hour before we could go and drop our bags off.
Overall the space is good, but not perfect. Decent value for money.
Hopefully they can get the aircon and shower door sorted, and I think it will be a much better experience.