Ailín and Richard's place is very well located, on the other side of the river, but very close to the bridge and the tram stop. You'll reach downtown and the main tourist attractions in a very pleasant few minutes walk, or in a only 2-stops tram ride.
The place is very cute, well decorated and the bed is extremely comfortable. It is also very quiet and you may hear some footsteps on the floor above, but it was really not a big deal for me.
If you have allergic rhinitis like me, try to leave the door opened more often to ventilate the place (it has no windows) and/or take some antihistamine with you. Unfortunately I had an allergic crisis and that was the only bad side of my stay there.
Although we could only meet in the check-in and check-out, I'd like to thank Ailín and Richard very much for the hospitality and help. My flight was cancelled due to an airport strike in France that happened on the day I was originally supposed to arrive there. They were very attentive and instantly accepted rescheduling my reservation for the following week.
Merci beaucoup!