We had a great stay at this apartment in downtown Porto! The management company was friendly & responsive, and the location was really great for walking and exploring the city and the river areas.
The house is on the older side which makes it very charming and beautiful, but it also brings the usual minor inconveniences like the fact that the heating system was a bit complicated and didn't work 100% of the time, and at one point we tripped one of the circuit breakers but were able to quickly get the power back on.
We understand these small things are common in many of the older buildings there, and it doesn't change our 5-star rating. We would certainly look to stay here again next time we are traveling with a group in Porto.