This is a the perfect apartment.
Comfortable, clean, nice terrasse day and night, perfect amenities, nice Smart Samsung TV with youtube if you want some cool music, great wifi, nice bathroom, awesome location.
Security guard at night in the building entrance.
Next to plaza de Cataluna, best shopping district, Rambla de Catalona where you have nice restaurants, I will recommande you "Cinco de Jota" with amazing belota, and another good one "Mont Bar" at 15 minutes walk and avoid "National "restaurant nearby who is mostly turistic target.
The host is wonderful and helpfully as well.
Only small issue there is only one room ( decription say 2 bedrooms which include the living room) and there is only one true bed , the second one is a sofa in the living room is nice but not so confortable as a true bed.
I think this flat is perfect for a family with 2 teens or kids.
I recommend it, and guest is perfect.