Since my fiancé and I were visiting Porto on vacation as tourists, we were mostly out of the apartment. The most important factor was that we had a quiet and comfortable place to sleep.
That unfortunately was not the case here at all. Structurally maybe it is impossible to have a quiet stay at this location, as we heard those staying above us walking, running around. It was extremely noisy and hard to relax or sleep at night.
One of the groups staying at the building also started banging and making noise at ~4 or 5am, and were extremely loud, waking my fiance and me up, even when we slept with earplugs in... Eugenia/Luis said that they did not follow the rules and that there wouldn't be anyone else staying above us the next night; however, I don't know if that was true, because we still heard loud noises above us the next night as well.
Another disappointment was that the apartment, upon entry, smelled strongly of fragrance, and yet, the trash can smelled strongly of rancid trash even though it was empty. So, the trash can probably needs a proper cleaning. I am allergic to fragrance (get really bad migraines, sometimes rashes/hives/eczema), so to enter a room that was thickly scented with fragrance was extremely unpleasant. I ended up unplugging the fragrance dispenser and I think someone who was working there picked it up, but overall, just feel there should be more consideration to folks who don't like or are allergic to fragrant oils/smells.