Zago's place was actually great. Me and my husband stayed in the room with the balcony and our stay was perfect. The room is bigger than it seems in the photos, it has a very comfortable bed and pillows, it has a wardrobe, a ceiling fan, a big mirror, two desks, some shelves and a big TV (so in short it was very well equipped). Zago was very friendly, helpful and flexible with the check in and check out, and he also provided us with towels, two bottle of waters and some snacks upon arrival. The location of the house is amazing, 5 mins away from the metro station and it is possible to walk everywhere (la rambla, la boqueria etc. needed a 10 min walk). The street was always lively but it did not bother us at all and we managed to sleep through everything (but if you're sensitive to noise some ear plugs would help).
In conclusion, Thank you Zago for opening your house to us, our stay in Barcelona was amazing and we would definitely rent this room again if we ever come back.