I ended up stranded at the Dublin Airport and Valentina's room listing was the only one in the area that was affordable and that I could book at such a short notice. So Valentina really saved the day and for this I will be eternally grateful to her.
The flat is located in a beautifully green neighborhood and has a truly good vibe. It is modest-looking in terms of infrastructure and furniture, but very clean, comfy and nicely equipped (for example, it has a splendid balcony and a well-equipped kitchen). I also had a good quality sleep on the bed in the room I rented.
Valentina and her partner Alvaro made me feel at home by interacting with me over tea and coffee that they generously shared with me, as well as by offering me to use freely the rest of their flat, if I wanted to.
Once again, I thank them greatly for their hospitality and openness.