We really enjoyed staying at Joana's place :) The location is great because all the main sights in the city center are in walking distance. Otherwise you can easily catch a metro from the station nearby.
There are also a lot of bar and restaurant options in this area but since it is a tourisic area they can be pricier than in other parts of Porto.
Since the flat is in the city center it can also be a little noisy at night. With the windows closed it isn't a big problem but in summer it can get quiet hot when you don't leave the windows open during night. So you have to choose between hot and quiet or cool and noisy ;)
The check in was really easy and Claudia, who checked us in, also answered upcoming questions during the stay.
The flat itself is pretty spacious and it is great to have such a big kitchen if you don't want to eat out for breakfast, lunch and dinner.
All in all it was a lovely stay and we can recommend staying there!