The flat was perfectly located, half a block from a Porto landmark (la Igresia dos Clerigos), and close to some of the most well known areas . Location was definitely the best feature. Water pressure was good and there was plenty of hot water, which is another plus.
The place is comfortable enough, though it is on the fourth floor (and the second floor on the mezannine with another flight of steps), so beware anyone that has trouble with stairs or is carrying heavy bags.
The area is a bit noisy sometimes at night, but nothing major and quite to be expected also because of the prime location.
We had a very smooth communication with Miguel who was always on call and helped us with a light bulb that was not working (a problem he solved in less than 24hrs) and also provided space to keep out bags after check out.
Overall a good experience and a good value for the price.