Carolina's place is very comfortable and in a great location. A few things were broken in the apartment, and it was very cold in the lounge and kitchen for our first few days (we were here in December). Once the heaters had been in for three days straight it was okay. Some electricians came while we were staying (Carolina warned us a few hours in advance), but the broken electrical items were not fixed.
The neighbourhood was excellent, great shops, close to a supermarket and it is easy to access public transport options to the centre of Porto.