I'm a bit conflicted about how to review my stay. The apartment did not meet my expectations but part of that is my fault. Part of the problem was lack of heating. This was mentioned as not being included in the amenities but I did not see it when I booked, so I certainly take the blame for that. I did have a Portuguese friend warn me that older apartments typically do not have heating so I did at least know this could be the case ahead of time. That being said, when we were there, the high temperature was 17, low of around 5 (Celsius) so at night it got pretty cold. Mafalda did provide us with sufficient blankets to keep us warm and told us that in case it still wasn't warm enough we could always ask for more! I feel like sleeping without heat in the apartment was ok but the other problem was the water did not get warm enough, nor did it have enough pressure when we showered. I am used to taking hot showers so on top of the cold apartment I just never got warm while there. I avoided showering one day (especially washing my hair) because I just didn't want to deal with being that cold again. Additionally, it is a bit noisy from the traffic on the streets so I had to sleep with earplugs in (this does not count New Years because I think no matter where you are in Porto it will be noisy and that is completely normal). The rugs should also be vacuumed as you can tell it has been a while they were cleaned.
Now for the more positive aspects, Mafalda is a great host and more than willing to help and flexible with check-in and check-out, which is very appreciated. Additionally, the kitchen seems very well stocked, I'm sure enough to make a meal (we dined out every night though so didn't experience it first hand). The place is a great value at around 40eur a night and about a 20 minute walk from some great restaurants/bars as well as Clérigos Tower, so makes staying in Porto very affordable. Overall, I'm sure when the weather is warmer (Spring - Autumn) it is a lovely place to stay and the lack of heat is no issue.