Eduardo was very kind, his response was very rapid and efficient. He kindly agreed my early check-in and luggage keeping after check-out. When I arrived, he was already in the room and carried my luggage up to the room. He gave me some advices to start sightseeing. 5 stars are not enough to appreciate his kindness.
As for the flat, there were more equipment than he himself mentions (but there was no microwave so you have only to pay attention to it). It is wide enough and it has very beautiful tiles as you can see in the photos. The bathtub is grand and clean, the boiling system works very well.
The location was also great, there are a lot of good restaurants which Eduardo recommended me. Even though the elevator of Gloria doesn't work now (until mid-march), I could access from the metro station by foot. You can also go to a mirador and some supermarkets by foot. The rua Rosa was a little bit noisy on Saturday night, but there are 2 bedrooms far from it so I could sleep very well (so if you are 3 or 4 people and you stay in weekend you should be careful because one of 3 bedrooms faces it).
In a word, I was very happy to find and stay there!