It definitely wasn't this cute, aesthetic place from the pictures. It was indeed spacious, but not that nicely designed (for example the table had scratches and holes all over it). The shower's door didn't close. Most imposrtantly, there was no heating - just a little fire that didn't really change anything in a room that big.
On the other hand, the apartament was perfectly clean. The kitchen was fully equipped - it had a microwave, a cofeemaker and a kettle. Also, the bed was really comfortable (and in a wardrobe I found an etra duvet).
So if you're looking for a cute, cozy apartment in the centre of Porto, then well... keep looking. But if you just want to sleep in a comfortable, clean place, this one will be just fine.