Very nice appartment (really looking like on the pictures!), very well prepared with coffee, milk, and orange juice in the fridge! very clean, not in city center but 30sec from metro station Les Corts. Elio is a very nice host. I definitely recommend this place!
The only "less pleasant" thing is that it can be a bit noisy (due to bad insulation of the building I guess), you might want to take ear plugs with you if you are sensitive to noise.