I will start by saying the location of this apartment is very convenient to everything. The apartment itself is very nice as well. We did, however, have issues with check in. We were told someone would be at the store when we arrived so we could drop our bags. No one was there so we had to drag our bags around until check in. We returned at check in time, were told that it wasn't ready and to come back in two hours. Upon returning, we were met by the very rude owner who held her hands up and said "no". We sat in the empty store for 30 minutes until it was ready.
We also had an issue with no hot water in one of the showers. We were told someone would look at it while we were out for the day. When we returned and asked about it, the owner told us (through her very sweet employee Sarah) that it was because we were trying to use both showers at once. This was not the case at all. The owner's son came up to look at it and said it was a plumbing issue and they would get someone out the next day. This also did not happen so we had to make due with four women and one shower for all three days we were there.
Lastly, when they show you where the reset button is for the electricity, pay attention! The power went out on us the first morning and we had to walk downstairs to the shop to reset it.
Sarah, who works at the wine store and helps with the apartment, was so nice and tried very hard to help us with our issues. We never actually met Carolina, who manages the apartment for the owner, Isabel. We loved Porto and tried not to let the apartment issues ruin our stay, but there were definitely inconveniences.