The good part: the place is HUGE, with plenty of separation between the sleeping quarters and the living/dining room. The kitchen is large, and with some amenities (although there is no modern coffee maker, and the coffee pot there needs filters, which were nowhere to be found at the local supermarket). Also great - the location - within walking distance to many of the beautiful Porto landmarks.
The not-so-good: if you plan driving in, make sure you know exactly where you need to park, and ask for pictures. The parking entrance is on a tiny street, with no place to stop, and no signs to indicate it; even the Google map pin can be tricky, as there are 10 entries within 25 meters on the street; especially if you get there after dark it may be difficult to find - and since you need to get into the apartment to get the parking remote, you have to figure out some back-up plan on where to leave the car (there is NO street parking right there). Also, there were homeless people hanging out at the apartment entrance - not a true concern, I believe, but it can be a bit nerve-wracking.