Overall we had an okay stay at the apartment.
We were, however, shocked when we saw a giant cockroach in the bathroom running around one night. Usually, this is a sign of uncleanliness. We only saw it one night, so maybe it was a one-off but it was a shock!!
On top of this, we personally felt like the kitchen was not stocked appropriately (no salt, no oil, no dish towel) and we were a bit lost with regards to the bin bag situation. There was only one bin bag provided, which was not enough for us. We feel like spare bin bags are something that should be provided.
Finally, with no notice the water in our apartment was turned off for a short period one day. This was very annoying, as we did not have any possibility to shower or flush the toilet.
The situation of the apartment is good if you are planning to use the metro a lot. We personally like to walk a lot and it does take about 25min walking to the city center/old city. This could be something to consider if you also are planing to explore Porto by for.